{"uid":"cap_c3bhUjkGcvRXaBZQ5Puz-","slug":"crypto-market-pulse-base-usdc-stats-text-base64-endpoint-93e13bc5","name":"Crypto Market Pulse & Base USDC Stats – Text/Base64 Endpoint","description":"Pay-per-call API for AI agents, settled in USDC on Base mainnet (eip155:8453) via the x402 protocol - no API keys, no signup, no subscription. Live crypto market data: BTC, ETH, SOL, USDC (USD Coin) prices with 24h change (source: OKX), Base mainnet chain snapshot (block height, gas price gwei), real-time USDC-on-Base transfer analytics (transfer count, volume, unique senders and recipients over recent blocks), and USDC/ETH wallet balances plus nonce for any address. Agent utility tools: deterministic JSON repair for LLM output (strip code fences, fix trailing commas, single quotes, unquoted keys, balance braces), DNS A/AAAA lookup, and URL extraction from arbitrary text. Every endpoint returns HTTP 402 with an x402 payment challenge in USDC on Base; pay with any wallet and retry with the PAYMENT-SIGNATURE header. MCP server at /mcp (streamable HTTP, 6 pay-per-call tools). Ideal for crypto portfolios, DeFi dashboards, market analysis agents, data pipelines, and LLM post-processing.","url":"https://baseusdcearn.pythonanywhere.com/text/base64","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"chain":{"chainId":8453,"network":"base-mainnet","blockHeight":21000000,"gasPriceGwei":0.05},"market":{"solana":{"usd":150,"usd_24h_change":-0.5},"bitcoin":{"usd":60000,"usd_24h_change":1.5},"ethereum":{"usd":3000,"usd_24h_change":2},"usd-coin":{"usd":1,"usd_24h_change":0}},"servedAt":1755430000}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0005","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":"$0.0005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_gZKbCwmi2a3a_k2caT41r","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live crypto market prices (BTC, ETH, SOL, USDC), Base mainnet chain snapshot, and USDC-on-Base analytics, paid per-call via x402 USDC on Base","exampleAgentPrompt":"Can you pull the current prices for Bitcoin, Ethereum, and Solana with their 24-hour changes, and also grab the latest Base mainnet block height and gas price?","exampleUseCases":[{"title":"DeFi dashboard market snapshot","prompt":"Give me a live snapshot of BTC, ETH, SOL, and USDC prices with their 24-hour changes, plus the current Base mainnet block height and gas price in gwei for my dashboard."},{"title":"USDC on-chain activity monitoring","prompt":"How many USDC transfers happened on Base recently, what was the total volume, and how many unique wallets were sending and receiving?"},{"title":"Crypto portfolio price check","prompt":"What are the current prices of Bitcoin, Ethereum, and Solana right now, and how much have they moved in the last 24 hours?"}],"resultDescription":"A JSON object containing: market prices and 24h percent changes for BTC, ETH, SOL, and USDC (sourced from OKX); Base mainnet chain info including current block height and gas price in gwei; USDC-on-Base transfer analytics (count, volume, unique senders/recipients over recent blocks); optionally, USDC and ETH wallet balances and nonce for a queried address; and a servedAt timestamp.","failureModes":["HTTP 402 returned if payment header is missing or invalid — must pay via x402 protocol with USDC on Base and retry with PAYMENT-SIGNATURE header","OKX market data may be delayed or unavailable during exchange outages","Base RPC node may return stale block height during network congestion","Invalid wallet address returns error or empty balance fields","Rate limiting or downtime on pythonanywhere free tier hosting"],"whenToPreferThis":"Choose this endpoint when you need a single pay-per-call, no-signup source combining live crypto prices (BTC/ETH/SOL/USDC from OKX), Base chain state, and USDC transfer analytics in one JSON response, billed in USDC via x402. Prefer it over traditional API-key services when building autonomous agents that need micro-payment-native data access without subscription overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:46:12.811Z","isFirstParty":false}