{"uid":"cap_mTHlgsmJowmQcPibLZuM0","slug":"telago-korea-execution-intelligence-x402-preflight-api-7cf28818","name":"TELAGO Korea Execution Intelligence x402 Preflight API","description":"Pay-per-call Korea execution intelligence for AI agents: address geocoding, building access, last-meter delivery, field service, robotics and cross-border logistics.","url":"https://telago-x402-discovery.vercel.app/preflight?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":["url"],"properties":{"url":{"type":"string","format":"uri","maxLength":1200,"minLength":12}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"checks":{"https":true,"reachable":true,"publicHost":true,"returns402":true,"amountValid":true,"payToPresent":true,"acceptsPresent":true,"networkPresent":true,"challengeParsed":true,"eip712DomainPresent":true},"product":"X402_ENDPOINT_PREFLIGHT_API","reasons":[],"verdict":"PAYABLE","httpStatus":402,"x402Version":2,"selectedAccept":{"asset":"0x...","payTo":"0x...","network":"eip155:8453","amountUsd":0.001,"amountAtomic":"1000"}}},"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_0xjKf3Z0Q0XKXASLU10lg","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":"Validates whether a given URL is a properly configured x402 pay-per-call endpoint before attempting payment, returning a structured PAYABLE/UNPAYABLE verdict with detailed checks.","exampleAgentPrompt":"Before I pay to call that Korea geocoding API, can you run a preflight check on https://telago-x402-discovery.vercel.app/api/geocode to confirm it's a valid x402 endpoint, that it's reachable, and what the exact USDC payment amount and Base network address are?","exampleUseCases":[{"title":"Pre-payment endpoint validation","prompt":"I'm about to call a pay-per-call Korea last-mile delivery API — can you run a preflight check on https://telago-x402-discovery.vercel.app/api/last-mile to make sure it's a legitimate x402 endpoint that will actually accept my USDC payment on Base before I send anything?"},{"title":"x402 integration debugging","prompt":"My agent is failing to pay an x402 API and I'm not sure if the endpoint is misconfigured — can you preflight-check https://telago-x402-discovery.vercel.app/api/field-service and tell me exactly which x402 checks are passing or failing, like whether it returns a 402, has a valid EIP-712 domain, and includes a payTo address?"},{"title":"Discovering payment parameters before calling","prompt":"I want to call the TELAGO Korea building-access API but I need to know the exact USDC amount and the wallet address to pay before I commit — can you preflight https://telago-x402-discovery.vercel.app/api/building-access and give me the payment amount and payTo address?"}],"resultDescription":"Returns a JSON object with a 'verdict' field ('PAYABLE' or not), a set of boolean checks (https, reachable, publicHost, returns402, amountValid, payToPresent, acceptsPresent, networkPresent, challengeParsed, eip712DomainPresent), the HTTP status code, x402 protocol version, selected payment details (asset address, payTo wallet, network, amountUsd, amountAtomic), and a reasons array explaining any failures.","failureModes":["Target URL is unreachable — reachable check returns false, verdict is not PAYABLE","Target URL does not return HTTP 402 — returns402 check fails","Missing or malformed EIP-712 domain in response — eip712DomainPresent is false","No payTo address present in the 402 challenge — payToPresent check fails","Invalid or zero payment amount — amountValid check fails","Target URL uses HTTP instead of HTTPS — https check fails","Network field absent or unrecognized in challenge — networkPresent check fails","Input URL is malformed or below minimum length — input validation error before any call is made"],"whenToPreferThis":"Use this endpoint when you need to validate an x402-protocol API before committing a blockchain micropayment — especially when building autonomous agent workflows that must confirm an endpoint is reachable, properly configured, and will accept USDC on a specific EVM network. Prefer this over blindly calling a pay-per-call endpoint when you want to avoid wasted payments on misconfigured or unreachable services. Also use it for debugging x402 integrations or dynamically discovering payment parameters (wallet address, amount, network) at runtime.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T06:45:35.121Z","isFirstParty":false,"canonicalSlug":"telago-korea-execution-intelligence-x402-preflight-api-7cf28818"}