Neutral fairness computation for agents: two or more parties submit sealed inputs, a published deterministic algorithm runs (fair division, verifiable random selection, Shapley shares), and every party receives an identical signed certificate anyone can re-run and verify for free.
Scored across 12 tools
The tools map cleanly to distinct lifecycle steps: create, validate, commit, reveal, fetch state, and verify. The only real ambiguity is among get_certificate, get_public_certificate, and verify_certificate, but their descriptions clarify deal-based retrieval, id-based retrieval, and verification.
All tool names follow a predictable snake_case verb-first pattern like create_, get_, commit_, reveal_, and verify_. compute_commitment_tool is slightly awkward compared to compute_commitment, but it does not break the overall naming style.
With 12 tools, the set is well-scoped for the server's purpose: onboarding, algorithm discovery, deal creation, sealed commitment and reveal, entropy finalization, and certificate verification. Each tool earns its place without significant redundancy.
The core fairness-deal lifecycle is well covered, including validation before commitment and certificate verification after completion. Minor gaps like no list-deals or cancel-deal operation exist, but VOID expiration and get_deal provide workarounds.
Commit your sealed input as a hash (sealed mode). Nobody — including redeal — can see your input until all parties have committed. After the last commitment the deal opens for reveals immediately.
Inputs: deal_id (required), commitment (required), invite_token (required), idempotency_key.
Compute a commitment string for (input, salt): sha256(JCS(input) ++ salt_bytes), prefixed 'sha256:'. Convenience only — the rule is public and you can compute it yourself.
Inputs: salt (required), input (required).
Create a fairness deal. You are party 0 (initiator). Returns a deal id and one invite token per party — give each counterparty their own token. Sealed mode: everyone commits a hash, then reveals; certificate is issued automatically when the deal computes or goes VOID.
Inputs: api_key (required), algorithm (required), party_labels (required), commit_deadline (required), +9 more.
Get a free redeal API key. No signup, no email — this is the entire onboarding. The key is shown once; store it. Use it as api_key in create_deal.
Inputs: no named parameters.
Fetch the signed fairness certificate for a finished deal (state CERTIFIED). Includes the labelled signature (es256 or ed25519) and transparency-log inclusion proof. Verify it with verify_certificate.
Inputs: deal_id (required), credential (required).
Read a deal's public state: protocol state (OPEN/COMMITTING/REVEALING/CERTIFIED/VOID/EXPIRED), who has committed/revealed, deadlines, result, and certificate_id once issued. Inputs of other parties are never exposed.
Inputs: deal_id (required), credential (required).
Finish a random.v1 deal once every party has revealed: redeal fetches the deal's pre-declared drand round from the public League of Entropy beacon (fixed at creation, publicly cross-checkable), computes the draw, and issues the certificate. Call this after the last reveal_input; the deal rests in REVEALING until you do. Idempotent — safe to retry.
Inputs: deal_id (required), credential (required).
Fetch a certificate's full JSON (outcome included) by id. Works for public deals (the default). Parties-only deals and unknown ids both return NOT_FOUND. To re-verify the computation itself, use verify_certificate (checks) or the CLI re-runner with the parties' inputs.
Inputs: cert_id (required).
List redeal's algorithms (split.v1 fixed-budget fair division, random.v1 verifiable random selection, shapley.v1 Shapley shares, auction.v1 sealed-bid second-price auctions) with their input contracts and the published test vectors (served inline — the same fixtures the engine test suite runs). Read this before creating a deal.
Inputs: no named parameters.
Reveal your committed input. It must hash to your earlier commitment. When the last party reveals, the deal computes and the fairness certificate is issued automatically — fetch it with get_certificate.
Inputs: input (required), deal_id (required), invite_token (required), salt, +1 more.
Validate your algorithm input against the deal's contract BEFORE you commit. A commitment binds the exact input bytes — a contract-violating input (e.g. split.v1 valuations not summing to exactly 1000) can never be corrected afterwards and the deal will VOID at the reveal deadline. Always validate first, then compute_commitment_tool, then commit_input. Read-only: nothing is stored or changed.
Inputs: input (required), deal_id (required), invite_token (required).
Verify a redeal certificate by id: signature check (current or published legacy key) + transparency-log inclusion check, reported per check. Free, no credential required, always.
Inputs: cert_id (required).
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Add one secure layer between your agents and this server.