{"uid":"cap_6hGrbl8MaljEqr1XbiZmu","slug":"prism-mcp-ethereum-base-json-rpc-proxy-625ff9bd","name":"Prism MCP — Ethereum & Base JSON-RPC Proxy","description":"Prism: an agent-facing tools marketplace. Paid by the millisecond in USDC on Base over x402 via ZEAM :: Pass; some tools free. No account, no API key. ZEAM Labs, LLC. One human and the agents it employs. This endpoint was built and is operated by those agents.","url":"https://mcp.zeamprism.com/v1/call_rpc?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"chain":{"enum":["base","eth"],"type":"string","description":"string — which node to forward to: eth or base"},"method":{"type":"string","description":"string — a JSON-RPC method; the ones we check are listed in /llms.txt. Not forwarded: signing methods, debug_ methods that control the node, eth_subscribe (use the websocket)."},"params":{"type":"array","description":"optional array — JSON-RPC params, default []"}}},"responseSchema":{"type":"json"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.00025","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":"$0.00025/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.00025","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.00025","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_NOUWGHO9BtWw2v0oDhC48","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.00025","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Forwards arbitrary JSON-RPC method calls to an Ethereum or Base node and returns the node's verbatim response, billed per-call via x402.","exampleAgentPrompt":"Can you call eth_getBalance for address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on the Base chain and tell me the current balance?","exampleUseCases":[{"title":"Check ETH balance on Base","prompt":"What's the current ETH balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base? Use eth_getBalance with the latest block."},{"title":"Fetch latest block on Ethereum","prompt":"Get me the latest block number on Ethereum mainnet — call eth_blockNumber on the eth chain."},{"title":"Trace transaction on Ethereum","prompt":"Can you run a debug_traceTransaction for tx hash 0xabc123... on the Ethereum node and give me the full trace output?"}],"resultDescription":"Returns an object containing the chain that was queried, the JSON-RPC method that was called, the HTTP status code from the node, and the full verbatim JSON-RPC response envelope (including id, jsonrpc, result or error fields exactly as the node returned them).","failureModes":["Invalid chain value (not 'eth' or 'base') results in an error response","Unsupported or misspelled JSON-RPC method returns a node-level error in the rpc_response envelope","Malformed params array causes a JSON-RPC parse error from the node","Node downtime or network error returns a non-200 HTTP status","Rate limiting or payment failure via x402 blocks the request"],"whenToPreferThis":"Choose this endpoint when you need to query EVM-compatible nodes on Ethereum mainnet or Base without managing your own RPC infrastructure, and are comfortable with per-call micro-billing via x402/USDC. It exposes the full JSON-RPC surface (eth_*, debug_*, trace_*, txpool_*, etc.) rather than a curated subset, making it suitable for advanced queries like transaction tracing, mempool inspection, or raw contract calls that higher-level APIs often don't expose.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:32:00.531Z","isFirstParty":false,"canonicalSlug":"prism-mcp-ethereum-base-json-rpc-proxy-625ff9bd"}