FreeSign — Free e-signature

com.free-sign/signingVersion 1.0.0

Free e-signature for humans and AI agents — zero-document PDF signing from hashes only.

Status

Responds172 msNov 14, 2026, 13:57 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:57 UTC
Latency: 172 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://free-sign.com/mcpResponds172 msNov 14, 2026, 13:57 UTC

No sign-in

Claude Code

claude mcp add --transport http signing https://free-sign.com/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: signing
Remote MCP server URL: https://free-sign.com/mcp

Cursor

{
  "mcpServers": {
    "signing": {
      "url": "https://free-sign.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"signing","type":"http","url":"https://free-sign.com/mcp"}'

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Tools

5 tools

Tools of FreeSign — Free e-signature
	Description		Read-only	Idempotent	Open world
`create_signing_envelope`Create a FreeSign envelope from a PDF SHA-256 hash. Do not send PDF bytes. The created envelope is NOT yet session-bound — the browser that opens the returned signing_url generates an ECDSA P-256 keypair locally and POSTs the public JWK to /api/envelopes/{id}/session-bind before any protected request will succeed. AI agents calling this tool just hand the signing_url to a human, who continues in a browser.	Create a FreeSign envelope from a PDF SHA-256 hash. Do not send PDF bytes. The created envelope is NOT yet session-bound — the browser that opens the returned signing_url generates an ECDSA P-256 keypair locally and POSTs the public JWK to /api/envelopes/{id}/session-bind before any protected request will succeed. AI agents calling this tool just hand the signing_url to a human, who continues in a browser.	Not declared	Not declared	Not declared	Not declared
`get_ots_proof`Return the .ots proof (base64) for a given OpenTimestamps anchor on an envelope. Use the official `ots-cli` to verify offline against Bitcoin block headers. Each seal has two anchors: `kind: "byterange"` commits to the signed document, `kind: "signed_attrs"` commits to SHA-256 of the CMS SignedAttributes (which carry the post-quantum key commitment).	Return the .ots proof (base64) for a given OpenTimestamps anchor on an envelope. Use the official `ots-cli` to verify offline against Bitcoin block headers. Each seal has two anchors: `kind: "byterange"` commits to the signed document, `kind: "signed_attrs"` commits to SHA-256 of the CMS SignedAttributes (which carry the post-quantum key commitment).	Not declared	Not declared	Not declared	Not declared
`get_receipt`Return the envelope record (including final_pdf_sha256, final_signature_base64url, final_payload_json), per-signer signing receipts, and OpenTimestamps anchor metadata. Evidence only, never PDF bytes.	Return the envelope record (including final_pdf_sha256, final_signature_base64url, final_payload_json), per-signer signing receipts, and OpenTimestamps anchor metadata. Evidence only, never PDF bytes.	Not declared	Not declared	Not declared	Not declared
`verify_audit_chain`Return an envelope's append-only audit-event hash chain together with a server-computed integrity verdict: every event_hash is recomputed from its canonical material, and the prev_event_hash linkage and per-envelope seq contiguity are checked. Evidence only, never PDF bytes. The raw events are included verbatim so the caller can independently re-derive the verdict instead of trusting `chain.valid`.	Return an envelope's append-only audit-event hash chain together with a server-computed integrity verdict: every event_hash is recomputed from its canonical material, and the prev_event_hash linkage and per-envelope seq contiguity are checked. Evidence only, never PDF bytes. The raw events are included verbatim so the caller can independently re-derive the verdict instead of trusting `chain.valid`.	Not declared	Not declared	Not declared	Not declared
`verify_document_hash`Find FreeSign receipts matching a local document SHA-256 hash.	Find FreeSign receipts matching a local document SHA-256 hash.	Not declared	Not declared	Not declared	Not declared

Details

Registry status: Active
Published: Jun 15, 2026
Updated: Jun 15, 2026
Website: https://free-sign.com/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): DocumentsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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