{"name":"Penny Engine agent task buyer guide","version":"0.7.7","discoveryType":"task-to-payable-resource","agentTaskExamples":[{"intent":"audit product catalog from CSV","signals":["product catalog audit","clean ecommerce product feed","normalize CSV and calculate margins"],"paidRoute":"/api/fulfill","method":"POST","priceUsd":0.001,"preflight":"/api/fulfill/preflight","freeDemo":"/demo/fulfill","sample":{"goal":"catalog-csv-audit","input":{"csv":"sku,name,price,cost\nSKU-1,Widget,25,10","targetMarginPct":25}},"guarantee":"Parse CSV, audit records, then validate the returned structure; input rows <=50. Not external publishing.","paidEndpoint":"https://penny-paid-batch-production.up.railway.app/api/fulfill","preflightEndpoint":"https://penny-paid-batch-production.up.railway.app/api/fulfill/preflight","demoEndpoint":"https://penny-paid-batch-production.up.railway.app/demo/fulfill"},{"intent":"verify output from another AI agent","signals":["validate JSON result","check required output fields","structured result QA"],"paidRoute":"/api/proof-gate","method":"POST","priceUsd":0.001,"freeDemo":"/demo/proof-gate","sample":{"result":{"status":"completed","count":2},"expectations":{"requiredPaths":["status"],"equals":{"status":"completed"},"numberRanges":{"count":{"min":1,"max":10}}}},"guarantee":"Deterministic checks of caller-supplied JSON with content fingerprint; not independent proof of task completion.","paidEndpoint":"https://penny-paid-batch-production.up.railway.app/api/proof-gate","preflightEndpoint":null,"demoEndpoint":"https://penny-paid-batch-production.up.railway.app/demo/proof-gate"},{"intent":"get fresh Base blockchain gas and block data","signals":["Base network gas price","current Base block height","estimate ETH transfer gas"],"paidRoute":"/api/base-network","method":"GET","priceUsd":0.001,"freeDemo":"/demo/base-network","sample":null,"guarantee":"Live network RPC snapshot; estimates are illustrative, not guaranteed transaction costs.","paidEndpoint":"https://penny-paid-batch-production.up.railway.app/api/base-network","preflightEndpoint":null,"demoEndpoint":"https://penny-paid-batch-production.up.railway.app/demo/base-network"}],"freeMcpEndpoint":"https://penny-agent-api-production.up.railway.app/mcp","mcpPreflightTool":"penny_fulfillment_preflight","freeToolCatalog":"https://penny-agent-api-production.up.railway.app/tools","paymentProtocol":"x402","network":"eip155:8453","asset":"USDC","purchaseInstructions":"Try the free demo and optional free preflight. If suitable, use a buyer-authorized x402 client with a funded Base USDC wallet. Retry the request with the correct payment signature. Do not send wallet credentials.","truthfulLimits":["Other requested tasks may be unsupported","No autonomous third-party purchases","First independently verified outside purchase still unconfirmed"],"outcome":"Discover exact tasks, ready sample inputs, free validation and paid endpoint in one response."}