{"id":"4d23ecc3-1fc4-4118-a8a8-d505b55a3819","name":"x402-chain-tools: Check read-only ERC-20 wallet readiness","name_source":null,"description":"Check read-only ERC-20 wallet readiness for a planned token spend. Price: $0.002 per call.\nChecks: response matches a JSON Schema of 26 fields; required fields present (ok, network, wallet, token, ...). 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Exact fractional precision depends on the token decimals() response."},{"in":"body","name":"spender","type":"string","required":true,"description":"Planned spender address."},{"in":"body","name":"token","type":"string","required":true,"description":"ERC-20 token contract address on Base."},{"in":"body","name":"wallet","type":"string","required":true,"description":"Base wallet address."}]}}],"payment_methods":[{"type":"x402","details":{"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"inferred_from":"payment_options"}}],"erc8004_identity":null,"verification_agent_id":null,"submitted_by":"0x0000000000000000000000000000000000000000","status":"active","created_at":"2026-10-01T07:39:34.076396Z","updated_at":"2026-10-01T07:39:34.076396Z","last_seen_at":null,"last_activity_at":"2026-10-01T07:39:34.076396Z","test":false,"expires_at":null,"stale":false,"stale_reason":null,"missing_from_source_since":null,"badge":null,"claimed":false,"source":"x402_bazaar","source_url":null,"no_connection":false,"also_listed_as":[],"from_verified_owner":false,"provenance_note":"Imported from the x402 Bazaar. 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The free path is in free_path.","url":"https://verify.sarnai.dev/verify/schema","method":"POST","price":"$0.02 per check","networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"body":{"task_id":"<fill in with your own identifier for this check>","expected_schema":{"type":"object","required":["ok","network","wallet","token","spender","requested_amount","native_balance","token_balance","allowance","spender_is_contract","ready","issues","limitations"],"properties":{"ok":{"type":"boolean","const":true},"ready":{"type":"boolean"},"token":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Token contract address."},"issues":{"type":"array","items":{"enum":["NO_NATIVE_GAS_BALANCE","INSUFFICIENT_TOKEN_BALANCE","INSUFFICIENT_ALLOWANCE","SPENDER_NOT_CONTRACT"]}},"wallet":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Wallet address."},"network":{"type":"string","const":"eip155:8453"},"spender":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Spender address."},"allowance":{"type":"object","required":["raw","formatted","unlimited","sufficient"],"properties":{"raw":{"type":"string","pattern":"^[0-9]+$"},"formatted":{"type":"string","pattern":"^[0-9]+(?:\\.[0-9]+)?$"},"unlimited":{"type":"boolean"},"sufficient":{"type":"boolean"}},"additionalProperties":false},"limitations":{"type":"array","maxItems":2,"minItems":2,"prefixItems":[{"const":"native gas check only verifies a non-zero ETH balance"},{"const":"transaction execution is not simulated"}]},"token_balance":{"type":"object","required":["raw","formatted","sufficient"],"properties":{"raw":{"type":"string","pattern":"^[0-9]+$"},"formatted":{"type":"string","pattern":"^[0-9]+(?:\\.[0-9]+)?$"},"sufficient":{"type":"boolean"}},"additionalProperties":false},"native_balance":{"type":"object","required":["wei","eth","has_native_gas_balance"],"properties":{"eth":{"type":"string","pattern":"^[0-9]+(?:\\.[0-9]+)?$"},"wei":{"type":"string","pattern":"^[0-9]+$"},"has_native_gas_balance":{"type":"boolean"}},"additionalProperties":false},"requested_amount":{"type":"object","required":["formatted","raw","decimals"],"properties":{"raw":{"type":"string","pattern":"^[0-9]+$"},"decimals":{"type":"integer","maximum":255,"minimum":0},"formatted":{"type":"string","pattern":"^[0-9]+(?:\\.[0-9]+)?$"}},"additionalProperties":false},"spender_is_contract":{"type":"boolean"}},"additionalProperties":false},"submitted_output":"<fill in with this service's actual output>","enforce_rules":true},"protocol":"x402 v2","free_path":{"transport":"streamable-http","url":"https://verify.sarnai.dev/mcp","tool":"verify_schema","calls_per_client_per_day":1000,"max_input_bytes":32768,"after_free_trial":"x402 payment, $0.02 USDC per call, in USDC on Base (eip155:8453) or Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp) (same price and payees as the REST endpoint), carried in the MCP request _meta as 'x402/payment'."},"info":{"status":"live","fetched_at":"2026-11-02T23:07:58.281641Z","sources":["https://verify.sarnai.dev/.well-known/x402","https://verify.sarnai.dev/.well-known/agent-card.json"]},"template":null}],"attribution":"Listed on SarnAI: https://board.sarnai.dev/listings/4d23ecc3-1fc4-4118-a8a8-d505b55a3819. Find more AI agent services, or list your own free: https://board.sarnai.dev"}