Koskamo

SignSimple MCP

An official MCP server provided by SignSimple that enables AI agents to programmatically send PDF documents for legally binding electronic signatures, track document status, list existing documents, and manage templates. It supports features like multi-party signing, secure cloud storage, and audit trails.

Visit SignSimple

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

SignSimple MCP logo, by SignSimpleVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-06Operated by SignSimple
You need:Account tools authenticate with an API key sent as an `Authorization: Bearer ss_live_...` header.API keys are free: create an account at https://signsimple.app and mint a key at https://signsimple.app/profile
MCP endpoint (Streamable HTTP)
https://signsimple.app/mcp
Vendor documentation

What its tools do

4 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Not annotated (4)

4 of 4 have a description · 0 of 4 declare behavior hints · 2 of 2 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Passed Official MCP Registry namespace is tied to signsimple.app ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Send a PDF document for electronic signature to a recipient
  • Check the current status of a sent document
  • List all documents associated with an account
  • List available document templates

Source and maintenance

Vendor evidenceRegistry 1.0.0
mcp-registry: app.signsimple/signsimple@1.0.0Project website

Protocol and capabilities

Server
signsimple 1.0.0
MCP protocol negotiated in check
2025-03-26
Tools
4 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {}
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

SignSimple is a free, unlimited e-signature service. Use send_for_signature to email a PDF to recipients for legally binding electronic signature, get_document_status to track progress, list_documents for recent sends, and list_templates for free ready-to-send legal templates. Account tools need an API key header (create one at https://signsimple.app/profile).

Tools

4 advertised

send_for_signature
Advertised by the server during the last successful anonymous check.

Send a PDF document for legally binding electronic signature via SignSimple (free, unlimited). Provide the PDF as a fetchable URL or base64, plus recipient name(s) and email(s). Each recipient is emailed a secure signing link; signature and date fields are placed automatically unless custom fields are given. Works with the free templates from list_templates (pass their pdf URL as document_url). Requires a SignSimple API key (create one at https://signsimple.app/profile).

send_for_signature input schema
{
  "type": "object",
  "required": [
    "document_name",
    "recipients"
  ],
  "properties": {
    "message": {
      "type": "string",
      "description": "Message included in the signing email (optional)"
    },
    "subject": {
      "type": "string",
      "description": "Email subject line (optional)"
    },
    "recipients": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "name",
          "email"
        ],
        "properties": {
          "name": {
            "type": "string"
          },
          "email": {
            "type": "string"
          }
        }
      },
      "maxItems": 10,
      "minItems": 1,
      "description": "People who must sign, in order"
    },
    "document_url": {
      "type": "string",
      "description": "Publicly fetchable URL of the PDF to send"
    },
    "document_name": {
      "type": "string",
      "description": "Display name for the document, e.g. \"Consulting Agreement.pdf\""
    },
    "document_base64": {
      "type": "string",
      "description": "Base64-encoded PDF (alternative to document_url)"
    },
    "expires_in_days": {
      "type": "number",
      "description": "Days until the signing links expire (optional, default 30)"
    }
  }
}
get_document_status
Advertised by the server during the last successful anonymous check.

Check the status of a document previously sent for signature: overall state (sent/completed/declined/expired/voided), per-recipient progress (pending/viewed/signed), and the signed PDF download URL once complete. Requires a SignSimple API key.

get_document_status input schema
{
  "type": "object",
  "required": [
    "envelope_id"
  ],
  "properties": {
    "envelope_id": {
      "type": "string",
      "description": "The envelopeId returned by send_for_signature"
    }
  }
}
list_documents
Advertised by the server during the last successful anonymous check.

List the 25 most recent documents sent from the connected SignSimple account, with status and signed-PDF URLs where complete. Requires a SignSimple API key.

list_documents input schema
{
  "type": "object",
  "properties": {}
}
list_templates
Advertised by the server during the last successful anonymous check.

List SignSimple's free, professionally drafted document templates (NDA, lease, contractor agreement, liability waiver, bill of sale, promissory note). Returns each template's info page and direct PDF URL — pass the PDF URL to send_for_signature as document_url to send one. No API key needed.

list_templates input schema
{
  "type": "object",
  "properties": {}
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

  1. 2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
278 ms
95th percentile latency
278 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 278 ms · metadata changed · 4 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http signsimple-mcp https://signsimple.app/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add signsimple-mcp --url https://signsimple.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable signsimple-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "signsimple-mcp": {
      "url": "https://signsimple.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "signsimple-mcp": {
      "type": "streamableHttp",
      "url": "https://signsimple.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start signsimple-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "signsimple-mcp": {
      "type": "http",
      "url": "https://signsimple.app/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http signsimple-mcp https://signsimple.app/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://signsimple.app/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "signsimple-mcp": {
      "serverUrl": "https://signsimple.app/mcp"
    }
  }
}

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Do you run SignSimple MCP?

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