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FreeSign — Free e-signature

com.free-sign/signing · v1.0.0

No registry update 90+ days

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Not declared (tools carry no read/destructive hints)
Capabilities declared	resources, tools
Tool definitions	5 tools · with description 100% · input schema is an object 100% · read/destructive hints 0%

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

streamable-http · https://free-sign.com/mcp

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

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

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 reques
verify_document_hash
Find FreeSign receipts matching a local document SHA-256 hash.
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.
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 SignedAttri
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 inclu

Website · JSON · Text for agents · Registry updated 2026-06-15