{"uid":"cap_5USB3QcTTnAzQYEThX28P","slug":"plainchain-bazaar-api-search-c4195530","name":"Plainchain Bazaar API Search","description":"Gas, balances, token data, address type, approvals, transaction decoding, x402 receipt verification and verifiable randomness on Base, Arbitrum, Ethereum and Optimism. No API key: pay $0.001-$0.01 per call in USDC on Base via x402.","url":"https://plainchain.appin60.com/v1/bazaar/search?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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":["q"],"properties":{"q":{"type":"string","description":"words describing the task, e.g. 'web search', 'token price', 'weather'"},"limit":{"type":"string","description":"1-25, default 10"},"network":{"type":"string","description":"optional, e.g. base or eip155:8453"},"max_price":{"type":"string","description":"optional max price per call in USD"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"query":"gas price base","ranking":"distinct paying wallets in the last 30 days...","results":[{"method":"GET","calls30d":236,"priceUsd":0.001,"resource":"https://api.example.com/gas","payers30d":236,"lastCalledAt":"2026-10-13T06:12:00.000Z"}],"snapshotAt":"2026-10-13T08:30:00Z"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001942","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":"$0.001942/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001942","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001942","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OvA39MW4EpU-R3Te9EXy1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001942","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Search a directory of pay-per-call blockchain data API endpoints by natural language query, returning ranked results with pricing and usage statistics","exampleAgentPrompt":"Search the Plainchain bazaar for endpoints related to 'gas price' on Base, show me the top 5 results under $0.005 per call.","exampleUseCases":[{"title":"Discover cheapest gas price API","prompt":"Find me an API endpoint for checking current gas prices on Base — show me up to 5 options and filter to ones that cost less than $0.005 per call."},{"title":"Find token balance endpoints on Arbitrum","prompt":"Search the Plainchain bazaar for endpoints that can fetch token balances on Arbitrum, and show me the top 10 results ranked by popularity."},{"title":"Locate transaction decoding endpoint","prompt":"Can you search for a pay-per-call API that decodes transactions on Ethereum? Show me the most-used options available."}],"resultDescription":"A JSON object containing the original query, a ranking explanation (based on distinct paying wallets in the last 30 days), a snapshotAt timestamp, and an array of matching endpoint results each with: HTTP method, resource URL, price in USD, 30-day call count, 30-day unique payer count, and last called timestamp.","failureModes":["Missing required 'q' query parameter returns validation error","No matching endpoints for the given query returns empty results array","Invalid network filter string may return no results or an error","Payment failure via x402 (insufficient USDC balance) blocks access","max_price filter too restrictive returns empty results","limit parameter outside 1-25 range may be rejected or clamped"],"whenToPreferThis":"Use this endpoint when an agent needs to dynamically discover which Plainchain blockchain data endpoints exist and are actively used, especially when the exact endpoint URL is unknown. Prefer this over hardcoding endpoint URLs when building flexible agents that need to adapt to new or changing API offerings, or when you want to compare pricing across available options for a given on-chain data task.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-14T06:30:35.929Z","isFirstParty":false,"canonicalSlug":"plainchain-bazaar-api-search-c4195530"}