{"uid":"cap_6_o9PeKD9e7iLKeBJuJ1A","slug":"cambrian-x402-evm-chains-list-3f898eca","name":"Cambrian x402 EVM Chains List","description":"Pay-per-use blockchain and social data for autonomous agents.","url":"https://x402.cambrian.org/evm/chains","method":"GET","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object","properties":{"queryParams":{"type":"object","additionalProperties":true}}},"output":{"type":"object","properties":{"example":{"type":"array"}}}}},"responseSchema":{"type":"array"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_bXvd2tS2JiXKJrEqu-CZF","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a list of supported EVM-compatible blockchain chains available through the Cambrian x402 API","exampleAgentPrompt":"What EVM-compatible blockchain networks does the Cambrian x402 API support? I want to know which chains I can query before making data calls.","exampleUseCases":[{"title":"Pre-flight chain compatibility check","prompt":"Before I start querying on-chain data, can you check which EVM chains are supported by Cambrian x402 so I know if Polygon and Arbitrum are available?"},{"title":"Agent network discovery for multi-chain app","prompt":"I'm building a multi-chain autonomous agent and need to know all the EVM networks Cambrian x402 covers — can you fetch that list for me?"},{"title":"Validate chain availability before payment","prompt":"I'm about to pay for a Cambrian x402 blockchain data call — can you first confirm which EVM chains are supported so I don't waste the 0.05 USDC on an unsupported network?"}],"resultDescription":"An array of supported EVM-compatible blockchain chain objects, likely including chain identifiers, names, and metadata about each network available through the Cambrian x402 pay-per-use data service.","failureModes":["Payment not included or insufficient USDC — returns 402 Payment Required","Network or service downtime — returns 5xx error","Invalid query parameters — may return 400 Bad Request","Empty array if no chains are currently configured"],"whenToPreferThis":"Use this endpoint when you need to discover or validate which EVM-compatible blockchain networks are supported before making subsequent pay-per-use data calls on Cambrian x402. It is the canonical reference for chain availability and should be called first in any multi-chain agent workflow using Cambrian.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:35:08.565Z","isFirstParty":false}