MCP Servers

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M
MCP Server
by @assinafy
GitHub Repo(2 stars)
Website

MCP Server for the Assinafy digital signature API. A digital signature platform for Brazil.

Created 5/11/2026
Updated about 2 hours ago
README
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Repository documentation and setup instructions

Assinafy MCP — Client Reference

A hosted Model Context Protocol Streamable HTTP server for system-to-system integrations with the Assinafy electronic-signature platform. The MCP server is a thin, multi-tenant proxy in front of the public Assinafy REST API (https://api.assinafy.com.br/v1). Every request carries the caller's API key and account ID; no per-tenant state is stored on the MCP server itself.

  • Endpoint: https://mcp.assinafy.com.br/mcp
  • Transport: MCP Streamable HTTP (stateless)
  • Protocol version: 2025-11-25
  • Auth: per-request HTTPS headers (or per-call _meta / arguments.auth)

Endpoint methods

The /mcp endpoint accepts two HTTP methods:

| Method | Purpose | |---|---| | GET /mcp | Returns a small JSON manifest: server name, version, MCP protocol version, transport, statelessness, and the full list of registered tools (name, title, description, annotations). Useful for capability discovery, browser smoke tests, and uptime probes. | | POST /mcp | The JSON-RPC entry point for all MCP operations (initialize, tools/list, tools/call, etc.). |

GET /mcp sample:

curl -sS https://mcp.assinafy.com.br/mcp

{
  "name": "assinafy-mcp-server",
  "version": "0.1.0",
  "protocol": "2025-11-25",
  "transport": "streamable-http",
  "stateless": true,
  "status": "ok",
  "tools": [
    {
      "name": "assinafy_list_documents",
      "title": "List Documents",
      "description": "List documents in an Assinafy workspace with optional pagination and search.",
      "annotations": { "readOnlyHint": true, "openWorldHint": true, "title": "List Documents" }
    }
    // ... 39 more
  ]
}

The server runs in stateless mode: there is no initialize handshake to persist, no Mcp-Session-Id to track, and GET /mcp does not open an SSE stream — clients fire each tools/call as a self-contained POST with the required headers.

Required headers

Every POST must include the following headers:

| Header | Required | Notes | |---|---|---| | Content-Type: application/json | yes | JSON-RPC 2.0 payload. | | Accept: application/json, text/event-stream | yes | MCP returns each response as a single SSE message event over text/event-stream. | | MCP-Protocol-Version: 2025-11-25 | yes | Required by the MCP spec on every request to a Streamable HTTP server. | | X-Api-Key | yes | Your Assinafy API key. Matches the official Assinafy REST API auth header. | | X-Assinafy-Account-Id | yes | Your workspace (account) ID. | | X-Assinafy-Webhook-Secret | conditional | Only required for assinafy_verify_webhook_signature, and only when secret is not passed inline as a tool argument. |

Bearer-token authentication is not supported.

The public mcp.assinafy.com.br host sits behind Cloudflare; clients without a recognisable User-Agent header may be challenged. Standard SDKs and curl send one by default — urllib-style minimal clients should set one explicitly.

Per-call credentials (no HTTP headers)

Clients that cannot attach custom headers (most browser embeds, some hosted chat platforms) can supply the same three credentials per tools/call. The server checks, in order: HTTP headers → _meta → arguments.auth → arguments.assinafy → arguments.credentials.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "assinafy_list_documents",
    "_meta": {
      "api_key": "<ASSINAFY_API_KEY>",
      "account_id": "<ASSINAFY_ACCOUNT_ID>"
    },
    "arguments": {}
  }
}

Recognised keys (snake_case or camelCase): api_key / apiKey / x_api_key, account_id / accountId, webhook_secret / webhookSecret. Any tool that accepts an explicit account_id argument uses that value over the header/_meta value for the single call.

Calling tools

Every operation flows through standard JSON-RPC tools/call. The HTTP response body is one SSE frame containing the JSON-RPC result.

curl -sS -X POST https://mcp.assinafy.com.br/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -H 'MCP-Protocol-Version: 2025-11-25' \
  -H "X-Api-Key: $ASSINAFY_API_KEY" \
  -H "X-Assinafy-Account-Id: $ASSINAFY_ACCOUNT_ID" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "assinafy_list_documents",
      "arguments": { "page": 1, "per_page": 20 }
    }
  }'

Raw response:

event: message
data: {"jsonrpc":"2.0","id":1,"result":{"content":[{"type":"text","text":"<JSON>"}],"structuredContent":{...}}}

For object-returning tools the result has both:

  • result.content[0].text — the JSON payload as a string.
  • result.structuredContent — the same payload as a JSON object.

For tools that return a bare array (e.g. assinafy_get_document_activities) the MCP SDK only populates result.content[0].text; clients should parse it with JSON.parse when they need the array. Plain-text results (delete confirmations, etc.) are returned only as content[0].text.

Failed tool calls return result.isError: true with a human-readable message in result.content[0].text:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "isError": true,
    "content": [{ "type": "text", "text": "API error 400: ..." }]
  }
}

The example payloads in the per-tool reference below show the structuredContent object (or content[0].text for plain-text / array results). The wrapping envelope is omitted for brevity.

Important: file upload requires server-side filesystem access

assinafy_upload_document reads the PDF directly from the MCP server's local filesystem using the supplied file_path. This works for self-hosted deployments (you control the path), but on the public hosted endpoint at https://mcp.assinafy.com.br/mcp a remote client cannot place a file where the server can read it.

Public hosted clients have two options:

  1. Upload via the Assinafy REST API directly (POST /v1/accounts/{account_id}/documents) and then use the MCP tools (assinafy_get_document, assinafy_create_assignment, …) to drive the rest of the workflow.
  2. Self-host this MCP server alongside whatever ingestion pipeline produces the PDF, so the server-side filesystem path is meaningful.

Every other tool works end-to-end against the public endpoint.

Document lifecycle quick reference

| Status | Meaning | |---|---| | uploading | File still being received. | | uploaded | File received, awaiting metadata extraction. | | metadata_processing | Backend extracting fields/pages. | | metadata_ready | Ready for signing setup. | | pending_signature | Assignment created; waiting on signers. | | expired | Assignment expired without completion. | | certificating | Final signing artifact is being generated. | | certificated | Fully signed; signed PDF + certificate page available. | | rejected_by_signer | A signer rejected the document. | | rejected_by_user | The sender cancelled the request. | | failed | Processing failed. |

assinafy_wait_document_ready returns when the document reaches any of metadata_ready, pending_signature, or certificated.

Tool reference

All 40 tools, organized by resource. Each entry lists arguments (verified against the input schema in tools/*.go) and the response shape observed against the live REST API. Where the underlying API enum is case-sensitive this is called out — Assinafy's API rejects "email" and accepts "Email".

Documents

assinafy_upload_document

Upload a PDF (max 25 MB) by server-side filesystem path. See the upload note above; only practical for self-hosted MCP deployments.

| Argument | Type | Required | Description | |---|---|---|---| | file_path | string | yes | Absolute path on the MCP server's filesystem. | | account_id | string | no | Override the account ID for this call. | | metadata | object | no | Arbitrary JSON metadata to attach to the document. |

Response (structuredContent):

{
  "resource": "document",
  "id": "2222bbbb2222bbbb2222bbbb2222",
  "account_id": "aaaa0000aaaa0000aaaa0000",
  "name": "sample_contract.pdf",
  "status": "uploaded",
  "artifacts": {
    "original": "https://api.assinafy.com.br/v1/documents/2222bbbb2222bbbb2222bbbb2222/download/original"
  },
  "pages": [],
  "created_at": "2026-05-11T23:25:38Z",
  "updated_at": "2026-05-11T23:25:38Z",
  "is_closed": false
}

Immediately after upload, status is usually uploaded or metadata_processing and pages is empty. Call assinafy_wait_document_ready to block until the backend finishes extracting page metadata.

assinafy_list_documents

| Argument | Type | Required | Description | |---|---|---|---| | page | int | no | 1-based page number. | | per_page | int | no | Results per page (max 100). | | search | string | no | Filter by document name. | | sort | string | no | Sort field; prefix - for descending (e.g. -created_at). | | account_id | string | no | Override account ID. |

Response:

{
  "data": [
    {
      "id": "1111aaaa1111aaaa1111aaaa111",
      "account_id": "aaaa0000aaaa0000aaaa0000",
      "name": "Sample Agreement.pdf",
      "status": "certificated",
      "is_closed": true,
      "created_at": "2025-03-13T14:24:20Z",
      "updated_at": "2025-03-13T14:26:51Z"
    }
  ],
  "meta": { "current_page": 1, "last_page": 2, "per_page": 3, "total": 4 }
}

assinafy_get_document

| Argument | Type | Required | |---|---|---| | document_id | string | yes |

Response (abridged — assignment.items is included when an assignment exists and contains the full field-placement data the signing UI uses):

{
  "resource": "document",
  "id": "1111aaaa1111aaaa1111aaaa111",
  "account_id": "aaaa0000aaaa0000aaaa0000",
  "name": "Sample Agreement.pdf",
  "status": "certificated",
  "is_closed": true,
  "signing_url": "https://app.assinafy.com.br/sign/1111aaaa1111aaaa1111aaaa111",
  "artifacts": {
    "original": "https://api.assinafy.com.br/v1/documents/.../download/original",
    "thumbnail": "https://api.assinafy.com.br/v1/documents/.../thumbnail",
    "certificated": "https://api.assinafy.com.br/v1/documents/.../download/certificated",
    "certificate-page": "https://api.assinafy.com.br/v1/documents/.../download/certificate-page",
    "bundle": "https://api.assinafy.com.br/v1/documents/.../download/bundle"
  },
  "assignment": {
    "id": "3333cccc3333cccc3333cccc333",
    "sender_email": "sender@example.com",
    "method": "collect",
    "expires_at": null,
    "message": null,
    "signers": [
      { "id": "4444dddd4444dddd4444dddd444", "full_name": "...", "email": "...", "has_accepted_terms": true }
    ],
    "copy_receivers": [],
    "items": [ /* per-page field placements with signer + display_settings */ ],
    "summary": {
      "signer_count": 1,
      "completed_count": 1,
      "signers": [ { "id": "...", "full_name": "...", "email": "...", "completed": true } ]
    },
    "signing_urls": [
      { "signer_id": "4444dddd4444dddd4444dddd444", "url": "https://app.assinafy.com.br/sign/...?email=..." }
    ]
  },
  "created_at": "2025-03-13T14:24:20Z",
  "updated_at": "2025-03-13T14:26:51Z"
}

The assignment.artifacts URLs follow the document's lifecycle: certificated / certificate-page / bundle only appear once the document reaches certificated.

assinafy_delete_document

Deletes the document (and any active assignment) in one call.

| Argument | Type | Required | |---|---|---| | document_id | string | yes |

Response (content[0].text):

Document deleted successfully

assinafy_get_document_activities

Chronological event log. Returns a bare JSON array in content[0].text (no structuredContent).

| Argument | Type | Required | |---|---|---| | document_id | string | yes |

Response (one entry per event; field shapes shown):

[
  {
    "id": 40549,
    "event": "document_ready",
    "message": "Documento pronto.",
    "origin": null,
    "payload": [],
    "created_at": "2025-03-13T14:26:51Z"
  },
  {
    "id": 40548,
    "event": "signer_signed_document",
    "message": "Signatário Jane Q. Sampleton assinou o documento.",
    "origin": {
      "ip": "203.0.113.1",
      "user-agent": "Mozilla/5.0 ..."
    },
    "payload": {
      "signer_full_name": "Jane Q. Sampleton"
    },
    "created_at": "2025-03-13T14:26:46Z"
  }
]

origin is null for system events and an object ({ip, user-agent}) for signer-driven events. payload is [] when empty and a map when populated. The MCP server forwards these fields as raw JSON without coercion.

assinafy_wait_document_ready

Polls the document until its status reaches metadata_ready, pending_signature, or certificated. The polling happens on the MCP server side — clients see one HTTP response when the document is ready (or when max_wait_secs elapses).

| Argument | Type | Required | Description | |---|---|---|---| | document_id | string | yes | | | max_wait_secs | int | no | Max seconds to wait (default 30). | | poll_secs | int | no | Polling interval (default 2). |

Response shape: same as assinafy_get_document.

assinafy_verify_document

Verify a signed document by its Assinafy signature hash. This is not a SHA-1 of the file bytes — it is the per-document hash that Assinafy generates at signing time and renders on the certificate page. Clients usually obtain it from a printed/exported certificate.

| Argument | Type | Required | |---|---|---| | hash | string | yes |

Response (when the hash is unknown):

{
  "hash": "deadbeef...",
  "is_valid": false,
  "message": "Documento não assinado ou não encontrado.",
  "id": null,
  "status": null,
  "completed_at": null,
  "completed_count": null,
  "page_count": null,
  "signer_count": null,
  "verified_at": "2026-05-11T23:23:48Z"
}

Valid hashes populate id, status, signer_count, completed_count, completed_at, and page_count. The boolean field is is_valid, not valid.

assinafy_get_signing_progress

| Argument | Type | Required | |---|---|---| | document_id | string | yes |

Response:

{ "signed": 1, "total": 1, "pending": 0, "percentage": 100 }

percentage is a number; integer values are returned without a decimal point.

assinafy_create_document_from_template

Create a document from a saved template, mapping signers to template roles.

| Argument | Type | Required | Description | |---|---|---|---| | template_id | string | yes | | | signers | array | yes | [{role_id, id, verification_method?, notification_methods?}]. | | name | string | no | Custom name for the resulting document. | | message | string | no | Signing invitation message. | | expires_at | string | no | ISO 8601 assignment expiry. | | account_id | string | no | Override account ID. |

verification_method and notification_methods[] values are case-sensitive and must use the upstream API spelling — see "Enum values" below. Response shape matches assinafy_get_document.

assinafy_estimate_document_from_template_cost

Estimate the credit cost before committing. Same arguments as assinafy_create_document_from_template minus the optional fields.

| Argument | Type | Required | |---|---|---| | template_id | string | yes | | signers | array | yes | | account_id | string | no |

Response shape: same as assinafy_estimate_assignment_cost (see below).

assinafy_download_document

Download a document artifact as base64.

| Argument | Type | Required | Description | |---|---|---|---| | document_id | string | yes | | | artifact | string | no | original (default) or certificated. |

Response:

{
  "document_id": "1111aaaa1111aaaa1111aaaa111",
  "artifact": "original",
  "base64": "JVBERi0xLjQK..."
}

The base64 decodes to the raw PDF bytes (%PDF magic at offset 0).

assinafy_download_signed_document

Convenience wrapper around assinafy_download_document with artifact: "certificated". Errors if the document is not yet certificated.

| Argument | Type | Required | |---|---|---| | document_id | string | yes |

Response shape: same as assinafy_download_document.

assinafy_is_fully_signed

| Argument | Type | Required | |---|---|---| | document_id | string | yes |

Response:

{ "fully_signed": true }

Signers

assinafy_create_signer

Idempotent by email. If the email is already registered, the existing signer is returned (other fields are not overwritten).

| Argument | Type | Required | Description | |---|---|---|---| | full_name | string | yes | | | email | string | yes | | | whatsapp_phone_number | string | no | E.164 format. | | cpf | string | no | Brazilian tax ID. Non-digits are stripped automatically. | | metadata | object | no | | | account_id | string | no | |

Response:

{
  "id": "5555eeee5555eeee5555eeee5555",
  "full_name": "Test Signer",
  "email": "test-signer@example.com",
  "has_accepted_terms": false
}

has_accepted_terms flips to true once the signer interacts with their first signing request. cpf, whatsapp_phone_number, and metadata are omitted from the response when unset.

assinafy_get_signer

| Argument | Type | Required | |---|---|---| | signer_id | string | yes | | account_id | string | no |

Response shape: same as assinafy_create_signer.

assinafy_list_signers

| Argument | Type | Required | |---|---|---| | page | int | no | | per_page | int | no | | search | string | no | | account_id | string | no |

Response:

{
  "data": [
    { "id": "bbbb0000bbbb0000bbbb0000", "full_name": "Jane Sampleton", "email": "sender@example.com", "has_accepted_terms": true }
  ],
  "meta": { "current_page": 1, "last_page": 1, "per_page": 5, "total": 3 }
}

assinafy_update_signer

Update a signer's contact details. Fails if the signer has active assignments.

| Argument | Type | Required | |---|---|---| | signer_id | string | yes | | full_name, email, whatsapp_phone_number, cpf | string | at least one | | account_id | string | no |

Response shape: same as assinafy_create_signer.

assinafy_delete_signer

| Argument | Type | Required | |---|---|---| | signer_id | string | yes | | account_id | string | no |

Response (content[0].text):

Signer deleted successfully

assinafy_find_signer_by_email

| Argument | Type | Required | |---|---|---| | email | string | yes | | account_id | string | no |

Returns the signer object (same shape as assinafy_create_signer) when a match exists. When no match exists the result is the JSON literal null (content[0].text == "null", no structuredContent).

Assignments

Enum values (read first)

The Assinafy API rejects the lowercase forms that look idiomatic from JavaScript / Python. Use the upstream spelling exactly:

| Field | Accepted values | |---|---| | signers[].verification_method | Email, Whatsapp | | signers[].notification_methods | ["Email"], ["Whatsapp"], or both | | method (top-level) | virtual, collect |

If you pass "email" instead of "Email" you will get API error 400: Método de verificação inválido. Pairing verification_method: "Email" with an empty notification_methods yields API error 400: O método de verificação de e-mail requer o método de notificação de e-mail.

assinafy_create_assignment

Create a signing assignment and notify signers.

| Argument | Type | Required | Description | |---|---|---|---| | document_id | string | yes | | | signers | array | yes | [{id, verification_method?, notification_methods?}]. | | method | string | no | virtual (default) or collect. | | message | string | no | Invitation message shown to signers. | | expires_at | string | no | ISO 8601. | | copy_receivers | array | no | Signer IDs that receive a copy without signing. |

Response (structuredContent) — for a single-signer virtual assignment:

{
  "id": "6666ffff6666ffff6666ffff6666",
  "method": "virtual",
  "sender_email": "sender@example.com",
  "message": "Demo signing request",
  "signers": [
    { "id": "5555eeee5555eeee5555eeee5555", "full_name": "Test Signer", "email": "...", "has_accepted_terms": false }
  ],
  "items": [
    {
      "id": "7777eeee7777eeee7777eeee7777",
      "completed": false,
      "field": { "id": "...", "name": "Virtual", "type": "virtual", "is_active": true, "is_required": false, "is_visible": true },
      "display_settings": [],
      "page": null,
      "signer": { "id": "...", "full_name": "...", "email": "..." },
      "value": null
    }
  ],
  "summary": {
    "signer_count": 1,
    "completed_count": 0,
    "signers": [ { "id": "...", "full_name": "...", "email": "...", "completed": false } ]
  },
  "signing_urls": [
    { "signer_id": "5555eeee5555eeee5555eeee5555", "url": "https://app.assinafy.com.br/sign/<doc>?email=..." }
  ]
}

Notes:

  • signing_urls is an array of {signer_id, url} objects, not a map.
  • items enumerates per-page signature placements. For virtual assignments these are single virtual fields; for collect they include display_settings with pixel coordinates and the originating page reference.
  • assignment.expires_at may be returned as null.

assinafy_estimate_assignment_cost

Estimate the credit cost before creating an assignment. Same signers / method rules as assinafy_create_assignment (you can pass signers with just verification_method and notification_methods, no id, when scoping out a hypothetical assignment).

| Argument | Type | Required | |---|---|---| | document_id | string | yes | | signers | array | yes | | method | string | no |

Response:

{
  "breakdown": [],
  "credits": 0,
  "credit_balance": 0,
  "documents": 1,
  "document_balance": 100,
  "extra_document_cost": 0,
  "needs_extra_document": false,
  "has_sufficient_resources": true,
  "total_credits": 0
}

breakdown populates when the assignment consumes credits (e.g. WhatsApp notifications); documents / document_balance track the document budget; has_sufficient_resources is the single boolean to gate the create call on.

assinafy_reset_assignment_expiration

| Argument | Type | Required | |---|---|---| | document_id | string | yes | | assignment_id | string | yes | | expires_at | string (ISO 8601) | yes |

Response: the updated assignment object (same shape as assinafy_create_assignment).

assinafy_resend_notification

Resend the signing invitation to a single signer.

| Argument | Type | Required | |---|---|---| | document_id | string | yes | | assignment_id | string | yes | | signer_id | string | yes |

Response:

{ "is_sent": true, "document_id": "doc_...", "signer_id": "sig_..." }

assinafy_estimate_resend_cost

Different response shape from assinafy_estimate_assignment_cost — this one is in terms of credits only, not document budget.

| Argument | Type | Required | |---|---|---| | document_id | string | yes | | assignment_id | string | yes | | signer_id | string | yes |

Response:

{
  "breakdown": [
    { "code": "NotificationEmailResend", "name": "Email Notification Resend", "cost": 0 }
  ],
  "credit_balance": 0,
  "has_sufficient_credits": true,
  "total": 0
}

assinafy_cancel_signature_request

Cancel an in-progress signature request for a document. The underlying endpoint is not part of the public Assinafy Swagger; in practice it returns API error 404 on documents in some states (e.g. already-cancelled, already-certificated). For routine cleanup, prefer assinafy_delete_document — it removes the document and any active assignment in one call regardless of state.

| Argument | Type | Required | |---|---|---| | document_id | string | yes | | reason | string | yes | | account_id | string | no |

Successful response:

{ "id": "doc_...", "status": "rejected_by_user", "decline_reason": "..." }

Webhooks

assinafy_register_webhook

Register (or replace) the workspace's webhook subscription.

| Argument | Type | Required | Description | |---|---|---|---| | url | string | yes | HTTPS endpoint receiving events. | | email | string | yes | Contact email for delivery failures. | | events | array | no | Event types to subscribe to; defaults to the full standard set. | | is_active | bool | no | Default true. | | account_id | string | no | |

Response:

{
  "url": "https://hooks.example.com/assinafy",
  "email": "ops@example.com",
  "events": ["document_ready", "signer_signed_document"],
  "is_active": true,
  "updated_at": "2026-04-11T14:22:26Z"
}

The workspace can have only one subscription. Registering replaces the existing one. id and created_at are not part of the standard response.

assinafy_get_webhook

| Argument | Type | Required | |---|---|---| | account_id | string | no |

A workspace that has never registered a webhook returns an empty-shape object, not null:

{ "url": "", "email": "", "events": [], "is_active": true, "updated_at": "..." }

Clients should treat url == "" as "no webhook configured."

assinafy_delete_webhook

| Argument | Type | Required | |---|---|---| | account_id | string | no |

Response (content[0].text):

Webhook subscription deleted

assinafy_inactivate_webhook

Disable the subscription without deleting it.

| Argument | Type | Required | |---|---|---| | account_id | string | no |

Response: the subscription object with is_active: false.

assinafy_list_webhook_event_types

No arguments. Returns a bare array (in content[0].text).

[
  { "id": "document_uploaded",        "description": "Triggered when the User has uploaded a Document" },
  { "id": "document_metadata_ready",  "description": "Triggered when the document is ready to be prepared. ..." },
  { "id": "document_prepared",        "description": "Triggered when the User as subject prepares a Document." },
  { "id": "assignment_created",       "description": "Triggered when the User created an assignment ..." },
  { "id": "signature_requested",      "description": "Triggered when the User requested signature of a Document" },
  { "id": "document_ready",           "description": "Triggered when the last Signer ... signs the Document ..." },
  { "id": "signer_created",           "description": "Triggered when the User created a Signer" },
  { "id": "signer_email_verified",    "description": "Triggered when Signer's email has been verified ..." },
  { "id": "signer_whatsapp_verified", "description": "Triggered when Signer's WhatsApp ... has been verified ..." },
  { "id": "signer_signed_document",   "description": "Triggered when Signer completed signing" },
  { "id": "signer_rejected_document", "description": "Triggered when Signer rejected the document" }
  // see live response for the authoritative current list
]

This is the canonical list — prefer it over hand-maintained constants.

assinafy_list_webhook_dispatches

| Argument | Type | Required | Description | |---|---|---|---| | event | string | no | Filter by event type. | | delivered | bool | no | Filter by delivery status. | | page, per_page | int | no | Pagination. | | account_id | string | no | |

Response:

{
  "data": [
    {
      "id": "wd_...",
      "event": "signer_signed_document",
      "activity_id": 42,
      "endpoint": "https://hooks.example.com/assinafy",
      "delivered": true,
      "http_status": 200,
      "created_at": 1715184000
    }
  ],
  "meta": { "current_page": 1, "last_page": 1, "per_page": 20, "total": 1 }
}

created_at on dispatch records is a Unix epoch integer (seconds), not an ISO 8601 string. endpoint, http_status, response_body, and error may be omitted (null) when the delivery has not yet been attempted.

assinafy_retry_webhook_dispatch

| Argument | Type | Required | |---|---|---| | dispatch_id | string | yes | | account_id | string | no |

Response: the updated dispatch record (same shape as the items in assinafy_list_webhook_dispatches).

assinafy_verify_webhook_signature

Validate that a received webhook body matches its X-Assinafy-Signature header using HMAC-SHA256. The signature is the raw hex digest, not a sha256=<hex> prefixed value. Pass the secret in any of three ways:

  1. arguments.secret (per-call).
  2. X-Assinafy-Webhook-Secret HTTPS header.
  3. _meta.webhook_secret / arguments.auth.webhook_secret.

| Argument | Type | Required | Description | |---|---|---|---| | payload | string | yes | Raw webhook request body, byte-for-byte. | | signature | string | yes | Value of X-Assinafy-Signature (hex digest, no prefix). | | secret | string | no | Webhook secret; falls back to per-request creds. |

Valid signature:

{
  "valid": true,
  "event_type": "signer_signed_document",
  "event_data": { "document_id": "doc_abc", "signer_id": "sig_xyz" }
}

Invalid signature (or missing secret):

{ "valid": false }

The HMAC comparison is timing-safe. event_data is taken from the envelope's data field (or object, whichever is present).

Workspaces

assinafy_create_workspace

| Argument | Type | Required | |---|---|---| | name | string | yes | | primary_color | string (hex) | no | | secondary_color | string (hex) | no |

Response shape: WorkspaceResponse — {id, name, primary_color?, secondary_color?, created_at}.

assinafy_list_workspaces

No arguments. Returns every workspace the API key can access, wrapped in {data: [...]} (the API response is a paginated list).

{
  "data": [
    {
      "id": "aaaa0000aaaa0000aaaa0000",
      "name": "Demo Workspace",
      "is_delete_allowed": true,
      "roles": ["owner"],
      "created_at": "2023-07-18T19:27:29Z"
    }
  ]
}

assinafy_get_workspace

| Argument | Type | Required | |---|---|---| | account_id | string | yes |

Response:

{
  "id": "aaaa0000aaaa0000aaaa0000",
  "name": "Demo Workspace",
  "created_at": "2023-07-18T19:27:29Z"
}

primary_color / secondary_color are present only when the workspace has them configured.

assinafy_update_workspace

| Argument | Type | Required | Description | |---|---|---|---| | account_id | string | yes | Workspace to update. | | name | string | no | New display name. | | primary_color | string | null | no | New color or null to clear. | | secondary_color | string | null | no | New color or null to clear. |

Response shape: WorkspaceResponse.

assinafy_delete_workspace

| Argument | Type | Required | |---|---|---| | account_id | string | yes |

Response (content[0].text):

Workspace deleted successfully

Templates

assinafy_list_templates

| Argument | Type | Required | |---|---|---| | page, per_page | int | no | | search | string | no | | account_id | string | no |

Response:

{
  "data": [
    {
      "id": "tpl_...",
      "name": "Service Agreement",
      "status": "ready",
      "account_id": "aaaa0000aaaa0000aaaa0000",
      "created_at": "2026-04-01T10:00:00Z",
      "updated_at": "2026-04-02T11:30:00Z"
    }
  ],
  "meta": { "current_page": 1, "last_page": 0, "per_page": 20, "total": 0 }
}

Empty workspaces return data: [] with total: 0.

assinafy_get_template

| Argument | Type | Required | |---|---|---| | template_id | string | yes | | account_id | string | no |

Response:

{
  "id": "tpl_...",
  "name": "Service Agreement",
  "status": "ready",
  "account_id": "aaaa0000aaaa0000aaaa0000",
  "roles": [
    { "id": "role_buyer",  "name": "Buyer" },
    { "id": "role_seller", "name": "Seller" }
  ],
  "created_at": "2026-04-01T10:00:00Z",
  "updated_at": "2026-04-02T11:30:00Z"
}

Unknown IDs return API error 404: Template não encontrado.

Errors

Tool-level failures (validation, upstream 4xx/5xx, network) return result.isError: true with the message in result.content[0].text:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "isError": true,
    "content": [{ "type": "text", "text": "API error 400: ..." }]
  }
}

Common categories:

  • Validation errors. Missing required arguments, missing credentials, or rejected enum values (Método de verificação inválido on lowercase verification_method).
  • Upstream API errors. The text is prefixed with API error <code>: followed by the upstream Portuguese-language message (e.g. API error 401: ..., API error 404: Página não encontrada.).
  • Network errors. Transport-level failures reaching the upstream Assinafy API. Surface as network error: ....

Protocol-level failures (malformed JSON-RPC, unknown methods) are returned through standard JSON-RPC error objects (response.error) rather than the tool envelope.

Webhook event types (full list)

Subscribe to any subset via assinafy_register_webhook. The authoritative list is whatever assinafy_list_webhook_event_types returns — the upstream catalog evolves.

Documents:

  • document_uploaded, document_metadata_ready, document_prepared, document_ready, document_processing_failed

Assignments / signing:

  • assignment_created, signature_requested

Signers:

  • signer_created, signer_email_verified, signer_whatsapp_verified, signer_data_confirmed, signer_viewed_document, signer_signed_document, signer_rejected_document, user_rejected_document

Templates:

  • template_created, template_processed, template_processing_failed
Quick Setup
Installation guide for this server

Installation Command (package not published)

git clone https://github.com/assinafy/mcp-server
Manual Installation: Please check the README for detailed setup instructions and any additional dependencies required.

Cursor configuration (mcp.json)

{ "mcpServers": { "assinafy-mcp-server": { "command": "git", "args": [ "clone", "https://github.com/assinafy/mcp-server" ] } } }