{"uid":"cap_dpja7yB1I4olNhzqqbUeS","slug":"meryol-agenticmarket-x402-hf-space-6e09ed41","name":"EVM Chain Health Probe","description":"Checks the health status of a specified blockchain network.","url":"https://meryol-agenticmarket-x402.hf.space/chain/health/:chain?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","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object","required":["chain"],"properties":{"chain":{"enum":["ethereum","base","arbitrum","optimism"],"type":"string"}}},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["score_0_100","healthy_rpc_count"]}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","pathParams":{"chain":"ethereum"},"queryParams":{}}},"response":{"rpcs":[{"rpc":"https://ethereum-rpc.publicnode.com","error":null,"block_ts":1781759639,"latency_ms":42,"block_number":25342288},{"rpc":"https://eth.drpc.org","error":null,"block_ts":1781759639,"latency_ms":84,"block_number":25342288},{"rpc":"https://1rpc.io/eth","error":null,"block_ts":1781759639,"latency_ms":228,"block_number":25342288},{"rpc":"https://cloudflare-eth.com","error":null,"block_ts":0,"latency_ms":102,"block_number":0}],"chain":"ethereum","notes":["rpc_divergence_25342288_blocks"],"head_age_s":13,"score_0_100":80,"max_lag_blocks":25342288,"total_rpc_count":4,"healthy_rpc_count":4,"median_block_number":25342288}},"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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__B_nviJJlJ6TQdPFB86K5","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":"Queries 3 public RPCs in parallel for a given EVM chain and returns median block number, RPC lag, head age, latency, and a 0-100 health score","exampleAgentPrompt":"Before I send this batch of transactions, can you run a liveness check on Base and tell me the health score, block lag between RPCs, and how fresh the chain head is?","exampleUseCases":null,"resultDescription":"Returns a JSON object with a 0-100 health score, median block number across 3 RPCs, max lag between RPCs (in blocks), head age (seconds since last block), per-RPC latency, and healthy RPC count — giving a complete picture of chain readiness.","failureModes":["Unsupported chain name returns a 400 or validation error — only ethereum, base, arbitrum, optimism are valid","All 3 RPCs unresponsive returns a low health score with healthy_rpc_count=0","High lag between RPCs may indicate a chain fork or indexing delay rather than full outage","Payment not included or invalid returns a 402 response before any chain data is fetched"],"whenToPreferThis":"Use this endpoint when an agent needs to verify chain liveness and RPC consensus before timing a transaction burst, switching RPC providers, or executing any latency-sensitive on-chain operation. Prefer over generic block explorers when you need a quantitative health score and multi-RPC lag comparison in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:43:40.341Z","isFirstParty":false,"canonicalSlug":"meryol-agenticmarket-x402-hf-space-6e09ed41"}