{"uid":"cap_0uFnOKU0Hw9PXn01_7-Jk","slug":"delx-commerce-token-echo-api-v1-6cb7fed5","name":"Delx Commerce Token Echo API (v1)","description":"Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.","url":"https://commerce.delx.ai/api/v1/x402/token-echo-1?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","description":"Input field: text."}}},"responseSchema":{"type":"json","example":{"echo":1,"text":"ping-delx-1","length":11,"schema":"delx/util-token-echo-1/v1"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_DUKpYnzWbkYc_peY2AFFr","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Echoes back a submitted text string along with its character length, serving as a minimal pay-per-call test endpoint on the x402 payment protocol.","exampleAgentPrompt":"Send the text 'ping-delx-1' to the Delx token echo endpoint and confirm it comes back with the correct length and schema label.","exampleUseCases":[{"title":"Validate x402 payment integration","prompt":"Can you ping the Delx token echo endpoint with the word 'hello' and confirm the payment went through and I got the text echoed back with its length?"},{"title":"Agent wallet smoke test","prompt":"Before I deploy my agent, I want to do a quick $0.001 USDC test call to the Delx echo API with the text 'test-agent-wallet' — just verify the whole pay-per-result cycle works."},{"title":"Confirm verifiable delivery on Base","prompt":"Run a test echo call with the string 'base-check' through Delx Commerce so I can see that USDC payment on Base is settling and the response includes the schema identifier."}],"resultDescription":"A JSON object containing: the echo version number (echo: 1), the original text string submitted, the character length of that string, and a schema identifier string ('delx/util-token-echo-1/v1') confirming which endpoint schema was used.","failureModes":["Payment not included or insufficient USDC — returns HTTP 402 requiring payment","Invalid or missing 'text' field in request body — likely returns a 400 bad request","Network or service unavailability — returns 5xx error","Unsupported payment network — USDC must be on Base or Solana"],"whenToPreferThis":"Use this endpoint when you need the simplest possible way to verify that your x402 micropayment pipeline is working end-to-end — it requires no signup, costs exactly $0.001 USDC per call, and confirms payment receipt, text handling, and verifiable delivery in a single round-trip. It is not meant for production data processing; choose it for integration testing and wallet/payment flow validation only.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:30:51.138Z","isFirstParty":false,"canonicalSlug":"delx-commerce-token-echo-api-v1-6cb7fed5"}