{"uid":"cap_ytNWii-VZ5BldPp38PcFV","slug":"taskmint-field-diff-656a4f0b","name":"TaskMint Field Diff","description":"Exact native USDC on Base; externally owned wallets only. Generate a private 32-byte random request_token for each new job, persist the entire body, and reuse it for challenge/retry and recovery. The token grants result access. Do not log or share it. HTTP 202 or an uncertain transport failure requires recovery with the identical body without a signature, never a new purchase. Results expire after 24 hours. Ten bounded deterministic services. Local execution is free; hosted jobs require customer-authorized payment only when billable.","url":"https://taskmint-sign-proof-node22-production.up.railway.app/api/agent/field_diff?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"payload":{"type":"object","required":["before","after","fields"],"properties":{"after":{"type":"object"},"before":{"type":"object"},"fields":{"type":"array","items":{"type":"string"},"maxItems":30,"minItems":1}},"additionalProperties":false},"request_token":{"type":"string","pattern":"^[a-f0-9]{64}$","description":"Generate 32 cryptographically random bytes as lowercase hex for each new job. Keep this private result credential and reuse the identical body for retries. Replace the synthetic example token."}}},"responseSchema":{"type":"json","example":{"state":"paid","result":{"flags":[],"status":"resolved","changed":true,"changes":[{"after":44.95,"field":"price","before":49.95},{"after":16,"field":"stock","before":20}],"version":"0.5.0","evidence":{"after":{"price":44.95,"stock":16,"status":"available"},"before":{"price":49.95,"stock":20,"status":"available"}},"freshness":"Client-supplied snapshots only. No live source check.","checked_fields":["price","status","stock"]},"service":"field_diff"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.0005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_qg8SJ1gApHmT4TKIPrTYE","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Compares two object snapshots across specified fields and returns a structured diff showing which fields changed, their before/after values, and a resolved status.","exampleAgentPrompt":"Compare these two product snapshots and tell me which of the fields — price, status, and stock — changed: before was price $49.95, stock 20, status available; after is price $44.95, stock 16, status available.","exampleUseCases":[{"title":"Detect price drop in product listing","prompt":"I have two snapshots of a product record — before it had a price of $49.95 and stock of 20, now it shows $44.95 and stock of 16. Can you diff just the price and stock fields and tell me exactly what changed?"},{"title":"Monitor config changes between deployments","prompt":"Here are the before and after states of our app config object. Check the fields timeout, max_retries, and feature_flag_enabled and tell me which ones changed between the two versions."},{"title":"Audit record edits in CRM data","prompt":"A customer record was updated — here are the old and new versions. I need to know which of these fields changed: email, phone, tier, and account_status. Give me a clear diff with the before and after values."}],"resultDescription":"A JSON object with a 'result' containing: a boolean 'changed' flag, a 'status' field (e.g. 'resolved'), a 'changes' array listing each changed field with its before and after values, a 'flags' array for anomalies, 'checked_fields' listing all fields evaluated, 'evidence' with the full before/after snapshots, 'freshness' note, and a 'version' string. Payment state is also returned.","failureModes":["Missing required fields (before, after, fields array) returns a 400 validation error","fields array exceeding 30 items is rejected","Invalid or missing request_token format (not 64-char hex) causes rejection","HTTP 402 returned when payment is required but not authorized","HTTP 202 with uncertain transport requires retry with identical body and same request_token — do not resubmit with a new token","Results expire after 24 hours; retrieval after expiry fails","Using a contract wallet instead of an externally owned wallet causes payment failure"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, structured field-level diff between two object snapshots you already have locally — especially when you want to track specific named fields (price, stock, status, etc.) rather than a full recursive diff. It is ideal for agentic workflows that poll or compare API responses over time and need a reliable, paid-per-call micro-service with retry-safe semantics. Prefer it over general-purpose JSON diff tools when you need structured output with evidence and a clear change flag per field, and when you are already working within the x402/USDC payment infrastructure on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T00:48:37.233Z","isFirstParty":false,"canonicalSlug":"taskmint-field-diff-656a4f0b"}