{"uid":"cap_l046y4DQXK8EG5ut-3OH3","slug":"json-key-denylist-8a549c99","name":"JSON Key Denylist","description":"JSON Key Denylist: JSON Key Denylist finds top-level object keys present in an explicit denylist from bounded caller-supplied values without an external provider. Call JSON Key Denylist before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for JSON Key Denylist as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base.…","url":"https://api.delx.ai/api/v1/x402/json-key-denylist","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"denied":{"type":"array","items":{"type":"string","maxLength":8192},"maxItems":256,"description":"Denied supplied to JSON Key Denylist; used only for this bounded calculation and processed in memory without retention."},"object":{"type":"object","description":"Object supplied to JSON Key Denylist; used only for this bounded calculation and processed in memory without retention.","maxProperties":128,"additionalProperties":true}}},"responseSchema":{"type":"json","example":{"result":{"passed":false,"denied_keys":["password"]},"schema":"delx/util-json-key-denylist/v1","status":"advisory","evidence":{"retained":false,"input_sha256":"e2140fb14617296830e26895419ba5db41e0d9b605a101ae52d4dc0f016e86e2","external_calls":0},"operation":"data_batch:json_key_denylist"}},"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_Wlk0dmYjPhPX0jviygjKj","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 a JSON object by identifying and filtering top-level keys that appear in a caller-supplied denylist, returning counts and normalized findings.","exampleAgentPrompt":"Before sending this plan object to the downstream tool, check it against my denylist of forbidden keys — ['password', 'secret', 'token', 'internal_id'] — and tell me which ones, if any, are present and how many violations were found.","exampleUseCases":[{"title":"Pre-flight check before strict API call","prompt":"I'm about to send this JSON payload to a partner API that rejects requests with certain keys. Can you check the object against this denylist — ['debug', 'trace', 'internal', 'dev_mode'] — and tell me if any of those keys are present before I submit?"},{"title":"Enforce data policy on agent output","prompt":"My agent just generated a structured result object and I need to make sure it doesn't include any of these restricted keys before logging it: ['user_email', 'ssn', 'credit_card', 'dob']. Can you run the denylist check and give me the count of violations?"},{"title":"Sanitize batch plan before handoff","prompt":"Before handing off this batch plan object to the fulfillment tool, scan it for any of these prohibited top-level keys: ['override', 'bypass', 'admin', 'root', 'superuser'] — I need to know exactly which ones triggered and a clean summary."}],"resultDescription":"A versioned deterministic JSON response containing: the count of denied keys found, the list of matched (denied) keys, normalized values, and a versioned result contract indicating which keys from the input object matched the supplied denylist.","failureModes":["Denylist array exceeds 256 items — request rejected","Input object exceeds 128 top-level properties — request rejected","Individual denylist string exceeds 8192 characters — request rejected","Malformed JSON body — parse error returned","Payment not attached or insufficient USDC — 402 response"],"whenToPreferThis":"Use this endpoint when an agent needs a lightweight, in-memory, stateless key-denylist check on a JSON object before passing it to a downstream tool with a stricter contract, and when no external provider or persistent storage should be involved. Prefer this over custom validation logic when you need a versioned, deterministic result with counts and normalized output for auditability.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:55:59.147Z","isFirstParty":false}