{"id":"lease","title":"Short lease with fencing tokens: claim a task for N seconds, renew, release","description":"Lets many agents agree which one works on a task: acquire a named resource for 1-3600 s, renew it while working, release it when done. Every new acquisition returns a strictly larger fencing token; pass it to the downstream store and reject writes carrying a smaller one, so a paused holder whose lease expired cannot clobber its successor. Re-acquiring as the current holder extends the lease with the same token. Scoped to the paying wallet (or tenantId for API-key callers). Not a distributed-systems guarantee beyond that: a lost lease is detected by renew failing.","roi":"Stops two agents buying, sending or deploying the same thing; one $0.005 call per claim.","audience":"agent-infra","package":"agent-coordination-kit","channels":["x402","mcp"],"endpoint":{"method":"POST","url":"https://agents.writerslogic.com/api/v1/lease","path":"/api/v1/lease","contentType":"application/json"},"price":{"amount":"0.005","currency":"USDC","network":"base","perCall":true,"failedCallsCharged":false},"inputSchema":{"type":"object","additionalProperties":false,"required":["op","resource"],"properties":{"op":{"type":"string","enum":["acquire","renew","release","get"]},"resource":{"type":"string","pattern":"^[A-Za-z0-9_.:/@+-]{1,200}$","description":"Task or resource name, e.g. invoice:INV-1009 or deploy:prod."},"holder":{"type":"string","minLength":1,"maxLength":128,"description":"Your worker id. Required for acquire, renew and release."},"ttlSeconds":{"type":"integer","minimum":1,"maximum":3600,"description":"Lease length; default 30."},"token":{"type":"integer","minimum":1,"description":"Fencing token from acquire; required for renew and release."},"tenantId":{"type":"string","pattern":"^[A-Za-z0-9_.-]{1,64}$","description":"Required for API-key callers (namespaced as key:<tenantId>; keep it unguessable). Ignored when a wallet paid: the payer address is the tenant."},"requestId":{"type":"string","pattern":"^[A-Za-z0-9_.:-]{1,128}$","description":"Caller-chosen id for this mutation. A retry with the same id and same input returns the stored response (24 h) instead of applying twice; the same id with different input is rejected. Send one on every mutation you may retry: without it a retry is applied again (fleet-memory record appends a duplicate; a repeated spend-ledger commit or release answers NO_HOLD because the first call already took effect)."}}},"resultSchema":{"type":"object","properties":{"status":{"type":"string","enum":["pass","fail","unknown","unsupported"],"description":"pass: every rule held. fail: a rule was violated (see witnesses). unknown: the input lacks the evidence to decide. unsupported: outside what this engine covers. Missing evidence is never a pass."},"op":{"type":"string"},"granted":{"type":"boolean","description":"acquire/renew: you hold the lease now. release: it is released. get: someone holds it."},"holder":{"anyOf":[{"type":"string","description":"Current holder, or null."},{"type":"null"}],"description":"Current holder, or null."},"fencingToken":{"anyOf":[{"type":"integer","description":"Token of the current lease, or null."},{"type":"null"}],"description":"Token of the current lease, or null."},"expiresAt":{"anyOf":[{"type":"string","description":"ISO time the current lease lapses, or null."},{"type":"null"}],"description":"ISO time the current lease lapses, or null."},"replayed":{"type":"boolean","description":"True when this response was replayed for a repeated requestId."},"witnesses":{"type":"array","items":{"type":"object","properties":{"ruleId":{"type":"string"},"detail":{"type":"string"},"path":{"type":"string","description":"JSON pointer or dotted path into the input."},"offset":{"type":"integer"},"index":{"type":"integer"},"expected":{"description":"What the rule required."},"actual":{"description":"What the input had."}}}},"versions":{"type":"object","description":"Every semantic dependency of this answer (engine, tables and their as-of dates, tokenizer, calendar, rounding profile)."},"limits":{"type":"array","items":{"type":"string"}},"deterministic":{"type":"boolean","description":"Always true: pure code, no model."}}},"outputSchema":{"type":"object","properties":{"data":{"type":"object","properties":{"status":{"type":"string","enum":["pass","fail","unknown","unsupported"],"description":"pass: every rule held. fail: a rule was violated (see witnesses). unknown: the input lacks the evidence to decide. unsupported: outside what this engine covers. Missing evidence is never a pass."},"op":{"type":"string"},"granted":{"type":"boolean","description":"acquire/renew: you hold the lease now. release: it is released. get: someone holds it."},"holder":{"anyOf":[{"type":"string","description":"Current holder, or null."},{"type":"null"}],"description":"Current holder, or null."},"fencingToken":{"anyOf":[{"type":"integer","description":"Token of the current lease, or null."},{"type":"null"}],"description":"Token of the current lease, or null."},"expiresAt":{"anyOf":[{"type":"string","description":"ISO time the current lease lapses, or null."},{"type":"null"}],"description":"ISO time the current lease lapses, or null."},"replayed":{"type":"boolean","description":"True when this response was replayed for a repeated requestId."},"witnesses":{"type":"array","items":{"type":"object","properties":{"ruleId":{"type":"string"},"detail":{"type":"string"},"path":{"type":"string","description":"JSON pointer or dotted path into the input."},"offset":{"type":"integer"},"index":{"type":"integer"},"expected":{"description":"What the rule required."},"actual":{"description":"What the input had."}}}},"versions":{"type":"object","description":"Every semantic dependency of this answer (engine, tables and their as-of dates, tokenizer, calendar, rounding profile)."},"limits":{"type":"array","items":{"type":"string"}},"deterministic":{"type":"boolean","description":"Always true: pure code, no model."}}},"_provenance":{"type":"object","description":"C2PA-aligned manifest and W3C VC 2.0 (eddsa-jcs-2022) issued by the hub DID; verify at POST /api/v1/verify-provenance"}},"required":["data","_provenance"]},"example":{"op":"acquire","resource":"invoice:INV-1009","holder":"worker-7","ttlSeconds":60,"requestId":"w7-claim-INV-1009"},"openapiOperation":{"operationId":"lease","summary":"Short lease with fencing tokens: claim a task for N seconds, renew, release","description":"Lets many agents agree which one works on a task: acquire a named resource for 1-3600 s, renew it while working, release it when done. Every new acquisition returns a strictly larger fencing token; pass it to the downstream store and reject writes carrying a smaller one, so a paused holder whose lease expired cannot clobber its successor. Re-acquiring as the current holder extends the lease with the same token. Scoped to the paying wallet (or tenantId for API-key callers). Not a distributed-systems guarantee beyond that: a lost lease is detected by renew failing.\n\nPrice: 0.005 USDC on Base (x402).","x-x402-price-usdc":"0.005","x-x402-amount":"5000","x-payment-info":{"protocols":["x402"],"price":{"mode":"fixed","currency":"USD","amount":"0.005"}},"x-audience":"agent-infra","x-sample-url":"https://agents.writerslogic.com/api/v1/samples/lease","security":[{"x402":[]},{"apiKey":[]}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","additionalProperties":false,"required":["op","resource"],"properties":{"op":{"type":"string","enum":["acquire","renew","release","get"]},"resource":{"type":"string","pattern":"^[A-Za-z0-9_.:/@+-]{1,200}$","description":"Task or resource name, e.g. invoice:INV-1009 or deploy:prod."},"holder":{"type":"string","minLength":1,"maxLength":128,"description":"Your worker id. Required for acquire, renew and release."},"ttlSeconds":{"type":"integer","minimum":1,"maximum":3600,"description":"Lease length; default 30."},"token":{"type":"integer","minimum":1,"description":"Fencing token from acquire; required for renew and release."},"tenantId":{"type":"string","pattern":"^[A-Za-z0-9_.-]{1,64}$","description":"Required for API-key callers (namespaced as key:<tenantId>; keep it unguessable). Ignored when a wallet paid: the payer address is the tenant."},"requestId":{"type":"string","pattern":"^[A-Za-z0-9_.:-]{1,128}$","description":"Caller-chosen id for this mutation. A retry with the same id and same input returns the stored response (24 h) instead of applying twice; the same id with different input is rejected. Send one on every mutation you may retry: without it a retry is applied again (fleet-memory record appends a duplicate; a repeated spend-ledger commit or release answers NO_HOLD because the first call already took effect)."}}},"example":{"op":"acquire","resource":"invoice:INV-1009","holder":"worker-7","ttlSeconds":60,"requestId":"w7-claim-INV-1009"}}}},"responses":{"200":{"description":"Paid result with provenance","content":{"application/json":{"schema":{"type":"object","properties":{"data":{"type":"object","properties":{"status":{"type":"string","enum":["pass","fail","unknown","unsupported"],"description":"pass: every rule held. fail: a rule was violated (see witnesses). unknown: the input lacks the evidence to decide. unsupported: outside what this engine covers. Missing evidence is never a pass."},"op":{"type":"string"},"granted":{"type":"boolean","description":"acquire/renew: you hold the lease now. release: it is released. get: someone holds it."},"holder":{"anyOf":[{"type":"string","description":"Current holder, or null."},{"type":"null"}],"description":"Current holder, or null."},"fencingToken":{"anyOf":[{"type":"integer","description":"Token of the current lease, or null."},{"type":"null"}],"description":"Token of the current lease, or null."},"expiresAt":{"anyOf":[{"type":"string","description":"ISO time the current lease lapses, or null."},{"type":"null"}],"description":"ISO time the current lease lapses, or null."},"replayed":{"type":"boolean","description":"True when this response was replayed for a repeated requestId."},"witnesses":{"type":"array","items":{"type":"object","properties":{"ruleId":{"type":"string"},"detail":{"type":"string"},"path":{"type":"string","description":"JSON pointer or dotted path into the input."},"offset":{"type":"integer"},"index":{"type":"integer"},"expected":{"description":"What the rule required."},"actual":{"description":"What the input had."}}}},"versions":{"type":"object","description":"Every semantic dependency of this answer (engine, tables and their as-of dates, tokenizer, calendar, rounding profile)."},"limits":{"type":"array","items":{"type":"string"}},"deterministic":{"type":"boolean","description":"Always true: pure code, no model."}}},"_provenance":{"type":"object","description":"C2PA-aligned manifest and W3C VC 2.0 (eddsa-jcs-2022) issued by the hub DID; verify at POST /api/v1/verify-provenance"}},"required":["data","_provenance"]}}}},"400":{"description":"Invalid request (no payment consumed)","content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"string"},"code":{"type":"string"}}}}}},"401":{"description":"Invalid X-API-KEY","content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"string"},"code":{"type":"string"}}}}}},"402":{"description":"Payment required or invalid","content":{"application/json":{"schema":{"type":"object","description":"x402 v2 PaymentRequired (also base64 in the PAYMENT-REQUIRED header)","properties":{"x402Version":{"type":"integer"},"error":{"type":"string"},"code":{"type":"string"},"resource":{"type":"object"},"accepts":{"type":"array","items":{"type":"object"}},"extensions":{"type":"object"}}}}}},"502":{"description":"Upstream failure; the payment is released or not settled","content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"string"},"code":{"type":"string"}}}}}}}},"links":{"docs":"https://agents.writerslogic.com/docs/lease/","docsJson":"https://agents.writerslogic.com/docs/lease.json","sample":"https://agents.writerslogic.com/api/v1/samples/lease","openapi":"https://agents.writerslogic.com/openapi.json","catalog":"https://agents.writerslogic.com/api/v1/catalog","verifyProvenance":"https://agents.writerslogic.com/api/v1/verify-provenance","index":"https://agents.writerslogic.com/docs/index.json"}}