Neutral fairness computation for agents: fair division, verifiable random, Shapley shares.
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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.
The deal id (d_...).
"sha256:" + hex of sha256(JCS(your input JSON) ++ your salt bytes). Compute it locally; the server sees only this hash until everyone has committed.
The invite token for YOUR party, from create_deal's response.
Optional: retries with the same key + same arguments replay the original response.
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
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.
| Argument | Type | Description |
|---|---|---|
| deal_id* | string | The deal id (d_...). |
| commitment* | string | "sha256:" + hex of sha256(JCS(your input JSON) ++ your salt bytes). Compute it locally; the server sees only this hash until everyone has committed. |
| invite_token* | string | The invite token for YOUR party, from create_deal's response. |
| idempotency_key | string | null | Optional: retries with the same key + same arguments replay the original response. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"invite_token",
"deal_id",
"commitment"
],
"properties": {
"deal_id": {
"type": "string",
"description": "The deal id (d_...)."
},
"commitment": {
"type": "string",
"description": "\"sha256:\" + hex of sha256(JCS(your input JSON) ++ your salt bytes). Compute it locally; the server sees only this hash until everyone has committed."
},
"invite_token": {
"type": "string",
"description": "The invite token for YOUR party, from create_deal's response."
},
"idempotency_key": {
"type": [
"string",
"null"
],
"description": "Optional: retries with the same key + same arguments replay the original response."
}
}
}Compute a commitment string for (input, salt): sha256(JCS(input) ++ salt_bytes), prefixed 'sha256:'. Convenience only — the rule is public and you can compute it yourself.
| Argument | Type | Description |
|---|---|---|
| salt* | string | Your hex salt (even length, e.g. 32+ random bytes hex-encoded). Keep it secret until reveal. |
| input* | any | Your algorithm input (any JSON value). |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input",
"salt"
],
"properties": {
"salt": {
"type": "string",
"description": "Your hex salt (even length, e.g. 32+ random bytes hex-encoded). Keep it secret until reveal."
},
"input": {
"description": "Your algorithm input (any JSON value)."
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| mode | string | null | "sealed" (default, commit/reveal) or "open" (single round trip, low stakes). |
| api_key* | string | Your redeal API key (get one free with create_key — no signup form). |
| algorithm* | string | Algorithm id from list_algorithms: "split.v1" (fixed 1,000-point budget) | "random.v1" | "shapley.v1" | "auction.v1". |
| retention | string | null | "standard" (inputs retained encrypted) or "purge" (destroyed 7 days after certification). |
| supersedes | string | null | Optional: certificate id (c_<16 hex>) this deal's certificate replaces (re-draw after VOID etc.). |
| terms_hash | string | null | Optional: "sha256:<hex>" of the deal's terms (echoed into the certificate; we never see the terms). |
| visibility | string | null | Optional: "public" (default — anyone can fetch the certificate at its id) or "parties" (only you and your invite-token holders). Certificates never contain inputs, only the outcome; choose "parties" when the outcome itself is sensitive. |
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.
No arguments.
{
"type": "object",
"properties": {}
}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.
| Argument | Type | Description |
|---|---|---|
| deal_id* | string | The deal id (d_...). |
| credential* | string | Your API key (initiator) or any party's invite token for this deal. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"credential",
"deal_id"
],
"properties": {
"deal_id": {
"type": "string",
"description": "The deal id (d_...)."
},
"credential": {
"type": "string",
"description": "Your API key (initiator) or any party's invite token for this deal."
}
}
}Read a deal's public state: protocol state (OPEN/COMMITTING/REVEALING/CERTIFIED/VOID/EXPIRED), who has committed/revealed, deadlines, result, and certificate_id once issued. Inputs of other parties are never exposed.
| Argument | Type | Description |
|---|---|---|
| deal_id* | string | The deal id (d_...). |
| credential* | string | Your API key (initiator) or any party's invite token for this deal. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"credential",
"deal_id"
],
"properties": {
"deal_id": {
"type": "string",
"description": "The deal id (d_...)."
},
"credential": {
"type": "string",
"description": "Your API key (initiator) or any party's invite token for this deal."
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| deal_id* | string | The deal id (d_...). |
| credential* | string | Your API key (initiator) or any party's invite token for this deal. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"credential",
"deal_id"
],
"properties": {
"deal_id": {
"type": "string",
"description": "The deal id (d_...)."
},
"credential": {
"type": "string",
"description": "Your API key (initiator) or any party's invite token for this deal."
}
}
}Fetch a certificate's full JSON (outcome included) by id. Works for public deals (the default). Parties-only deals and unknown ids both return NOT_FOUND. To re-verify the computation itself, use verify_certificate (checks) or the CLI re-runner with the parties' inputs.
| Argument | Type | Description |
|---|---|---|
| cert_id* | string | The certificate id (c_...). Verification is free and always will be. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"cert_id"
],
"properties": {
"cert_id": {
"type": "string",
"description": "The certificate id (c_...). Verification is free and always will be."
}
}
}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.
No arguments.
{
"type": "object",
"properties": {}
}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.
| Argument | Type | Description |
|---|---|---|
| salt | string | null | Your hex salt from commitment time. Omit (or empty) for open-mode deals. |
| input* | any | Your algorithm input exactly as committed (any JSON value). split.v1: {"valuations": {...}} — your valuations must sum to exactly 1000; random.v1: {"nonce": "<hex>"}; shapley.v1: {"accept": true|false}; auction.v1: {"bid": <integer>}. |
| deal_id* | string | The deal id (d_...). |
| invite_token* | string | The invite token for YOUR party, from create_deal's response. |
| idempotency_key | string | null | Optional: retries with the same key + same arguments replay the original response. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"invite_token",
"deal_id",
"input"
],
"properties": {
"salt": {
"type": [
"string",
"null"
],
"description": "Your hex salt from commitment time. Omit (or empty) for open-mode deals."
},
"input": {
"description": "Your algorithm input exactly as committed (any JSON value). split.v1: {\"valuations\": {...}} — your valuations must sum to exactly 1000; random.v1: {\"nonce\": \"<hex>\"}; shapley.v1: {\"accept\": true|false}; auction.v1: {\"bid\": <integer>}."
},
"deal_id": {
"type": "string",
"description": "The deal id (d_...)."
},
"invite_token": {
"type": "string",
"description": "The invite token for YOUR party, from create_deal's response."
},
"idempotency_key": {
"type": [
"string",
"null"
],
"description": "Optional: retries with the same key + same arguments replay the original response."
}
}
}Validate your algorithm input against the deal's contract BEFORE you commit. A commitment binds the exact input bytes — a contract-violating input (e.g. split.v1 valuations not summing to exactly 1000) can never be corrected afterwards and the deal will VOID at the reveal deadline. Always validate first, then compute_commitment_tool, then commit_input. Read-only: nothing is stored or changed.
| Argument | Type | Description |
|---|---|---|
| input* | any | The algorithm input you plan to commit (e.g. {"valuations": {"<item_id>": <points>}} for split.v1 — every party's valuations must sum to exactly 1000). Validated against the deal's algorithm and declared params; nothing is stored. |
| deal_id* | string | The deal id (d_...). |
| invite_token* | string | The invite token for YOUR party, from create_deal's response. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"invite_token",
"deal_id",
"input"
],
"properties": {
"input": {
"description": "The algorithm input you plan to commit (e.g. {\"valuations\": {\"<item_id>\": <points>}} for split.v1 — every party's valuations must sum to exactly 1000). Validated against the deal's algorithm and declared params; nothing is stored."
},
"deal_id": {
"type": "string",
"description": "The deal id (d_...)."
},
"invite_token": {
"type": "string",
"description": "The invite token for YOUR party, from create_deal's response."
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| cert_id* | string | The certificate id (c_...). Verification is free and always will be. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"cert_id"
],
"properties": {
"cert_id": {
"type": "string",
"description": "The certificate id (c_...). Verification is free and always will be."
}
}
}| external_ref | string | null | Optional: your own identifier for this deal, e.g. "campaign-4821" (echoed into the certificate). |
| party_labels* | array | One label per party, e.g. ["alice", "bob"] — or objects {"label", "weight"?, "statement_hash"?} (weight defaults to 1; statement_hash is "sha256:<hex>" of a declaration you want bound into the certificate). Party 0 is you (the initiator). Labels go on the public certificate permanently: use nicknames, never real names or emails. |
| commit_deadline* | integer | Commit deadline as unix seconds UTC. Missed → deal EXPIRES (no certificate). |
| idempotency_key | string | null | Optional: retries with the same key + same arguments replay the original response. |
| reveal_deadline* | integer | Reveal deadline as unix seconds UTC (after commit_deadline). Missed → deal goes VOID and a non-participation certificate names whoever didn't reveal. |
| algorithm_params | any | Algorithm-specific params from list_algorithms. split.v1: {"items": [...]}; random.v1: {"drand_round": N}; shapley.v1: {"coalition_values": {...}}; auction.v1: {"item": "...", "unit": "GBP", "reserve": N}. |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"api_key",
"algorithm",
"party_labels",
"commit_deadline",
"reveal_deadline"
],
"properties": {
"mode": {
"type": [
"string",
"null"
],
"description": "\"sealed\" (default, commit/reveal) or \"open\" (single round trip, low stakes)."
},
"api_key": {
"type": "string",
"description": "Your redeal API key (get one free with create_key — no signup form)."
},
"algorithm": {
"type": "string",
"description": "Algorithm id from list_algorithms: \"split.v1\" (fixed 1,000-point budget) | \"random.v1\" | \"shapley.v1\" | \"auction.v1\"."
},
"retention": {
"type": [
"string",
"null"
],
"description": "\"standard\" (inputs retained encrypted) or \"purge\" (destroyed 7 days after certification)."
},
"supersedes": {
"type": [
"string",
"null"
],
"description": "Optional: certificate id (c_<16 hex>) this deal's certificate replaces (re-draw after VOID etc.)."
},
"terms_hash": {
"type": [
"string",
"null"
],
"description": "Optional: \"sha256:<hex>\" of the deal's terms (echoed into the certificate; we never see the terms)."
},
"visibility": {
"type": [
"string",
"null"
],
"description": "Optional: \"public\" (default — anyone can fetch the certificate at its id) or \"parties\" (only you and your invite-token holders). Certificates never contain inputs, only the outcome; choose \"parties\" when the outcome itself is sensitive."
},
"external_ref": {
"type": [
"string",
"null"
],
"description": "Optional: your own identifier for this deal, e.g. \"campaign-4821\" (echoed into the certificate)."
},
"party_labels": {
"type": "array",
"items": true,
"description": "One label per party, e.g. [\"alice\", \"bob\"] — or objects {\"label\", \"weight\"?, \"statement_hash\"?} (weight defaults to 1; statement_hash is \"sha256:<hex>\" of a declaration you want bound into the certificate). Party 0 is you (the initiator). Labels go on the public certificate permanently: use nicknames, never real names or emails."
},
"commit_deadline": {
"type": "integer",
"format": "int64",
"description": "Commit deadline as unix seconds UTC. Missed → deal EXPIRES (no certificate)."
},
"idempotency_key": {
"type": [
"string",
"null"
],
"description": "Optional: retries with the same key + same arguments replay the original response."
},
"reveal_deadline": {
"type": "integer",
"format": "int64",
"description": "Reveal deadline as unix seconds UTC (after commit_deadline). Missed → deal goes VOID and a non-participation certificate names whoever didn't reveal."
},
"algorithm_params": {
"description": "Algorithm-specific params from list_algorithms. split.v1: {\"items\": [...]}; random.v1: {\"drand_round\": N}; shapley.v1: {\"coalition_values\": {...}}; auction.v1: {\"item\": \"...\", \"unit\": \"GBP\", \"reserve\": N}."
}
}
}