{"uid":"cap_Qzh7TAEog-xuis42tQeY0","slug":"json-canonicalize-65fcd179","name":"JSON Canonicalize","description":"Machine-buyable infrastructure for autonomous agents: API cost routing, margin optimization, funding-rate data, webpage extraction, result verification, spend controls, retry planning, state, tender search and GitHub bounty intelligence.","url":"https://bounty-engineer-x402-prod.onrender.com/v1/json-canonicalize?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"value":{}}},"responseSchema":{"type":"json","example":{"ok":true,"result":{"bytes":13,"sha256":"...","canonical":"{\\\"a\\\":1,\\\"b\\\":2}"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_i1t9s7WpNXmjD5bCdPYrJ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Canonicalizes a JSON value into a deterministic byte sequence and returns its SHA-256 hash and canonical string representation","exampleAgentPrompt":"Canonicalize this JSON object and give me its SHA-256 hash so I can use it as a deterministic fingerprint: {\"b\": 2, \"a\": 1}","exampleUseCases":[{"title":"Deterministic signing of API payloads","prompt":"Before I sign this JSON payload with my private key, I need it canonicalized so the signature is stable regardless of key ordering — can you canonicalize {\"timestamp\": 1718000000, \"user\": \"alice\", \"amount\": 50} and give me the SHA-256?"},{"title":"Deduplication by JSON fingerprint","prompt":"I'm seeing what might be duplicate records in my pipeline. Can you canonicalize each of these two JSON objects and compare their SHA-256 hashes so I know if they're semantically identical, even though the keys are in different orders?"},{"title":"Audit log integrity verification","prompt":"I stored this JSON event in my audit log and I want to verify it hasn't been tampered with. Canonicalize {\"action\": \"login\", \"user\": \"bob\", \"ts\": 1718001234} and give me the SHA-256 so I can compare it against my stored fingerprint."}],"resultDescription":"Returns a JSON object with `ok: true`, a `result` object containing the canonical JSON string representation, the SHA-256 hash of the canonical bytes, and the byte length of the canonical form.","failureModes":["Invalid or unparseable input value returns an error response","Extremely large or deeply nested JSON may cause timeout or rejection","Missing `value` field in request body may return a validation error","Network errors from the Render-hosted service during high load"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, key-order-independent canonical representation of a JSON value along with its SHA-256 hash — ideal for cryptographic signing, deduplication, integrity verification, or any scenario where JSON key ordering must not affect the output. Prefer this over ad-hoc JSON.stringify approaches when reproducibility and a hash fingerprint are both required in one call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:42:50.384Z","isFirstParty":false,"canonicalSlug":"json-canonicalize-65fcd179"}