FreeSign — Free e-signature
Free e-signature for humans and AI agents — zero-document PDF signing from hashes only.
| Endpoint | https://free-sign.com/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.0 |
| Now | 5 tools · grade A (100) · pin ts_39ecfe9a85f361a1965b4b0cef111c77 · protocol 2025-06-18 |
| First / last listed | 2026-10-26 02:39 UTC / 2026-10-26 02:39 UTC |
| Grade over time | 2026-10-26: A (100), 5 tools |
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Tools: create_signing_envelope verify_document_hash get_receipt get_ots_proof verify_audit_chain
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 params: document_sha256* |
verify_document_hash | Find FreeSign receipts matching a local document SHA-256 hash. params: document_sha256* |
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. params: envelope_id* |
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). params: envelope_id*, anchor_id* |
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` params: envelope_id* |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.