# Evidenode > Fixed-block Base token observations with inspectable RPC evidence for agent execution logs. Experimental; not a security audit or token safety guarantee. Status: preview; paid endpoint unavailable until seller configuration is complete. ## Discover and evaluate - [OpenAPI](https://www.evidenode.com/openapi.json): request, response, error and payment contract - [Service manifest](https://www.evidenode.com/.well-known/evidenode.json): capabilities and price - [Free sample](https://www.evidenode.com/v1/sample): historical USDC snapshot; never interpret as current observations - [Response schema](https://www.evidenode.com/schemas/token-evidence.json) - [Buyer guide](https://www.evidenode.com/agents): payment-enabled integration example ## Purchase POST https://www.evidenode.com/v1/token-evidence with Content-Type: application/json and {"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}. No account or API key. Price is 0.02 USDC (20000 atomic units) on Base mainnet, using x402 v2 exact. Unpaid requests return 402 with PAYMENT-REQUIRED. Use an official x402 buyer SDK and a wallet with Base USDC; inspect and cap network, asset, recipient and amount before signing. Retry with PAYMENT-SIGNATURE. Successful settlement returns evidence plus PAYMENT-RESPONSE containing a transaction hash. Never send private keys or seed phrases. Malformed inputs and failed analyses are not settled. On ambiguous network failures, inspect the payment transaction before submitting another payment. Receipt storage can fail after settlement; X-Evidenode-Receipt then reports unavailable, while the purchased JSON is still delivered. Save your response. ## Results and limits Checks: runtime bytecode, ERC-20 metadata, owner(), EIP-1967 implementation/beacon slots, and canonical EIP-1167 proxy runtime. All observations are pinned to one Base block; self-reported token metadata and RPC provider trust remain limitations. Not covered: honeypots, liquidity, holder concentration, transfer taxes, blacklist, mint roles, verified source or transaction simulation. low_risk_signals only refers to observed checks, never permission to trade. unknown and insufficient_data must not be treated as pass. GET https://www.evidenode.com/v1/receipts/{receiptId} retrieves public purchased JSON retained for 30 days from the latest purchase of that receipt. Do not send confidential data. Receipt ID excludes observedAt and is a content hash, not a signed attestation. Contact: t@ineeza.com