{"uid":"cap_wsQ9nHoqmXDxnMQkA1OAx","slug":"signalharness-agent-tool-call-validator-2691f07d","name":"SignalHarness Agent Tool Call Validator","description":"Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.","url":"https://signalharness.ai/api/agent/services/agent_tool_call_validate/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"request_json":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Verify the caller-supplied data before relying on this result."],"service_id":"agent_tool_call_validate","analysis_json":"{\"example\":\"schema-valid caller-supplied data\"}","evidence_scope":"caller_supplied_data"},"status":"succeeded","receipt":{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","usage":[],"status":"succeeded","network":"eip155:8453","artifacts":[],"endedAtMs":0,"latencyMs":0,"paymentId":"example-payment","receiptId":"example-receipt","requestId":"example-request","serviceId":"agent_tool_call_validate","executionId":"example-execution","startedAtMs":0,"amountAtomic":"5000","resultSha256":"c824d3b775a0c55472193d1aa39beb5925c92b05148ebe3af552a8f049a96277","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-Mt9BglVan1Ljc3wFam_K","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates an AI agent tool call JSON payload for correctness, schema compliance, and potential issues before execution","exampleAgentPrompt":"Before I execute this tool call, can you validate the following JSON payload to make sure it's correctly formed and flag any warnings: {\"tool\": \"send_email\", \"params\": {\"to\": \"alice@example.com\", \"subject\": \"Hello\"}}?","exampleUseCases":[{"title":"Pre-flight check for agent action","prompt":"Before my agent fires off this tool call, validate this JSON to make sure it won't fail: {\"tool\": \"create_calendar_event\", \"params\": {\"title\": \"Team Sync\", \"date\": \"2025-06-01\", \"duration_minutes\": 30}}"},{"title":"Debugging malformed agent payload","prompt":"My agent keeps erroring on this tool invocation — can you run it through the validator and tell me what's wrong with this JSON: {\"tool\": \"query_database\", \"params\": {\"table\": \"orders\", \"limit\": \"ten\"}}?"},{"title":"Quality gate in automated agent pipeline","prompt":"I'm building an agent pipeline and want to validate every outgoing tool call before execution — check this one for schema errors or warnings: {\"tool\": \"charge_card\", \"params\": {\"amount\": 99.99, \"currency\": \"USD\", \"customer_id\": \"cust_123\"}}"}],"resultDescription":"Returns a validation result object containing a status (succeeded/failed), a boolean replay flag, an analysis_json string with structured findings, a list of warnings about the payload, an evidence_scope label (e.g. caller_supplied_data), and a full receipt with payment metadata, latency, and a SHA-256 hash of the result.","failureModes":["Malformed or non-JSON request_json string returns a validation error","Payload exceeding 65,536 characters is rejected","Missing required request_json field causes a bad request response","Ambiguous or empty JSON (below 2 characters) is rejected by minLength constraint","Payment failure on the x402 protocol may prevent invocation"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call validation layer for AI agent tool call JSON before execution — especially useful in automated pipelines where catching malformed payloads early prevents downstream failures. Prefer it over manual schema checks when you want a structured analysis with warnings and an auditable receipt, or when operating within a Base USDC x402 payment environment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:04:21.432Z","isFirstParty":false}