{"uid":"cap_6ba-qWFqIx53f-iuoyEOT","slug":"agenttools-json-formatter-validator-ba207acf","name":"AgentTools JSON Formatter & Validator","description":"Validate JSON with precise error messages, pretty-print it with any indent, and inspect its top-level type and element counts. Use this when an agent needs to validate, pretty-print and inspect JSON.","url":"https://agenttools-hub.vercel.app/api/v1/dev/json-formatter?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["json"],"properties":{"json":{"type":"string","description":"JSON"},"indent":{"type":"number","description":"Indent spaces"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"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_d-AmcZMVzDBSHAfOzVYDP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates JSON with precise error messages, pretty-prints it with configurable indentation, and reports the top-level type and element count.","exampleAgentPrompt":"Can you validate this JSON and pretty-print it with 2-space indentation: '{\"name\":\"Alice\",\"age\":30,\"active\":true}'?","exampleUseCases":[{"title":"Debugging malformed API response","prompt":"I got this JSON back from an API and it's failing to parse — can you validate it and give me the exact error: '{\"user\":{\"id\":42,\"name\":\"Bob\",\"roles\":[\"admin\",\"editor\"}}'?"},{"title":"Readable formatting for code review","prompt":"This minified JSON blob is impossible to read — can you pretty-print it with 4-space indentation so I can review the structure? Here it is: '{\"config\":{\"timeout\":30,\"retries\":3,\"endpoints\":[\"a\",\"b\"]}}'"},{"title":"Inspecting structure of unknown JSON","prompt":"Tell me the top-level type and how many elements are in this JSON so I know what I'm working with: '[{\"id\":1},{\"id\":2},{\"id\":3}]'"}],"resultDescription":"Returns a validation status (valid or error with precise error message), the pretty-printed JSON string formatted with the requested indentation, the top-level type (object, array, string, number, boolean, null), and the count of top-level elements or keys.","failureModes":["Missing required 'json' query parameter returns an error","Malformed JSON input returns a validation error with a descriptive message indicating the parse failure location","Invalid indent value (non-numeric) may cause unexpected formatting behavior","Extremely large JSON payloads may hit URL length limits since input is passed as a query parameter"],"whenToPreferThis":"Choose this endpoint when you need to quickly validate, format, or inspect JSON without running code — especially useful when an agent receives raw JSON from an external source and needs to confirm its validity before further processing, or when a human-readable formatted version is needed for display or debugging. Prefer this over writing custom parsing logic when the task is purely structural inspection or beautification.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T12:41:24.467Z","isFirstParty":false,"canonicalSlug":"agenttools-json-formatter-validator-ba207acf"}