{"uid":"cap_JzoDRq55U8suX7V7h9D5V","slug":"signalharness-agent-tool-call-argument-checker-92dda7de","name":"SignalHarness Agent Tool Call Argument Checker","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_argument_check/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_argument_check","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_argument_check","executionId":"example-execution","startedAtMs":0,"amountAtomic":"10000","resultSha256":"381c26a429b5fdd738a82a32af7e0086e023d001d00e86a8c87828bda3c75acb","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_sfAvSiUW4d9dIx7GWfyXC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates and analyzes JSON arguments passed to agent tool calls, returning warnings and analysis about the caller-supplied data.","exampleAgentPrompt":"Can you check these JSON arguments I'm about to pass to an agent tool call and tell me if there are any issues or warnings? Here's the payload: {\"city\": \"New York\", \"date\": \"2025-06-01\", \"count\": 5}","exampleUseCases":[{"title":"Pre-flight agent tool argument validation","prompt":"Before I invoke that weather tool, run a check on these arguments I'm about to send — {\"latitude\": 40.7128, \"longitude\": -74.006, \"units\": \"metric\"} — and flag any warnings or problems with the payload."},{"title":"Debugging malformed tool call inputs","prompt":"I'm getting weird results from my agent's tool calls. Can you analyze this JSON argument blob to see if there's anything structurally wrong or suspicious with it? Here's what it's sending: {\"query\": null, \"limit\": -1, \"mode\": \"fast\"}."},{"title":"Safety check on agent-generated arguments","prompt":"My agent just generated these arguments to pass to a payment tool — {\"amount\": 9999, \"currency\": \"USD\", \"recipient\": \"unknown\"} — can you validate them and tell me if there are any warnings I should know about before I let this go through?"}],"resultDescription":"Returns a JSON object indicating whether the call is a replay, the service ID, an analysis_json string containing the parsed and validated argument data, an evidence_scope field indicating the data source (e.g. 'caller_supplied_data'), a list of warnings, and a full receipt object with payment details, latency, execution IDs, and a SHA-256 result hash.","failureModes":["Malformed or non-JSON request_json string returns an error","Payload exceeds 65536 character limit and is rejected","Caller-supplied data may not represent true schema validity — warnings always note to verify independently","Payment failure via x402 prevents execution","Ambiguous or missing request_json field causes invocation failure"],"whenToPreferThis":"Use this endpoint when an AI agent needs to validate or sanity-check JSON arguments before passing them to a tool call, especially in safety-critical or payment-adjacent workflows. It is particularly valuable when agents generate their own arguments and you want a second-pass check for malformed data, suspicious values, or schema violations. Prefer this over rolling your own JSON schema validator when you want a pay-per-call, agent-native service with a receipt and audit trail.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T12:00:15.642Z","isFirstParty":false}