{"uid":"cap_6Dz9d1Ysxn9ErmwmikjRu","slug":"signalharness-token-allowance-change-analyzer-c3ea2a7b","name":"SignalHarness Token Allowance Change Analyzer","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/token_allowance_change/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"allowance_change_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Allowance records are caller supplied and may be stale."],"service_id":"token_allowance_change","evidence_scope":"caller_supplied_data","allowance_change_analysis":"{\"decreases\":0,\"increases\":1,\"records\":[{\"after_atomic\":\"2\",\"before_atomic\":\"1\",\"delta_atomic\":\"1\",\"direction\":\"increase\",\"owner\":\"0x0000000000000000000000000000000000000001\",\"spender\":\"0x0000000000000000000000000000000000000002\",\"unlimited_after\":false}],\"unlimited_after\":0}"},"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":"token_allowance_change","executionId":"example-execution","startedAtMs":0,"amountAtomic":"10000","resultSha256":"faf38a66d32ed5da0dc78115ccd3495c6b37cf131d643f756e6fd3d86fd0397e","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_A7buA5Z5bA_pIMwlBh9Zv","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":"Analyzes a token allowance change request and returns a structured assessment with warnings and evidence scope","exampleAgentPrompt":"Can you analyze this token allowance change request and tell me if there are any warnings or risks I should know about: 'Uniswap is requesting unlimited USDC allowance on Base mainnet for my wallet'?","exampleUseCases":[{"title":"DeFi protocol allowance safety check","prompt":"I'm about to approve a token allowance for a new DeFi protocol on Base — can you analyze this request and flag any warnings before I sign it? The request says: 'Aave V3 requests unlimited DAI spending approval from my wallet 0xabc123'"},{"title":"Agent wallet allowance audit","prompt":"My autonomous trading agent just submitted an allowance change request — can you analyze it and tell me the evidence scope and any concerns? Here's the request: 'Agent requests 10,000 USDC allowance increase for DEX aggregator contract 0xdef456 on Base'"},{"title":"Suspicious approval investigation","prompt":"Someone sent me a transaction to approve a token allowance and it feels off — can you run an analysis on this allowance change request and surface any warnings: 'Unknown contract 0x999 requesting max uint256 USDC allowance, claiming to be a bridge'?"}],"resultDescription":"Returns a JSON object containing: an allowance_change_analysis narrative, a list of warnings, an evidence_scope label ('caller_supplied_data'), replay status, and a full receipt with payment details, request/execution IDs, result hash, and settlement reference on the Base network.","failureModes":["Input string too short (below 2 characters) or too long (above 65536 characters) causing validation failure","Malformed or ambiguous allowance request text resulting in incomplete analysis","Payment failure on the x402 protocol leading to unpaid/rejected call","Network or service unavailability returning a non-succeeded status","Insufficient context in the request causing vague or low-confidence analysis output"],"whenToPreferThis":"Choose this endpoint when you need a quick, structured AI-powered analysis of a token allowance change request — especially in agentic or automated DeFi workflows where an agent must decide whether to proceed with or flag an on-chain approval. It is particularly useful when you want machine-readable warnings and an evidence scope label alongside the narrative analysis, and when operating on Base network with USDC micropayment billing via x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:45:15.341Z","isFirstParty":false}