{"slug":"agent402-tools-api-b20-memos-3f21ba","title":"Payment memos attached to B20 transfers","host":"agent402.tools","method":"GET","resource":"https://agent402.tools/api/b20-memos","category":"market","description":"Payment memos attached to B20 transfers: pairs each Memo(address,bytes32) log with its Transfer at the previous log index (same tx, same token). Give a tx hash for one transaction, or scan a block window. Returns memoHex always and memoText when printable UTF-8. ?token=0xb200…&tx=0x…|&blocks=50000&a","price_listed":0.005,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":6,"reported_payers_30d":1,"networks":["algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=","eip155:10","eip155:1329","eip155:137","eip155:143","eip155:42161","eip155:42220","eip155:43114","eip155:4663","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","stellar:pubnet"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"blocks":1000,"token":"0xb200000000000000000000000000000000000001"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"address":{"description":"optional: only transfers where from or to equals this address","type":"string"},"blocks":{"description":"window-scan lookback (default 50000, max 200000; ignored when tx is given)","type":"number"},"limit":{"description":"max memo rows (default 50, max 200)","type":"number"},"token":{"description":"B20 token address (must carry the 0xb200 prefix)","type":"string"},"tx":{"description":"optional: decode memos in this transaction only","type":"string"}},"required":["token"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"count":{"type":"integer"},"fromBlock":{"type":"integer"},"memos":{"type":"array"},"mode":{"type":"string"},"scannedFromBlock":{"type":"integer"},"toBlock":{"type":"integer"},"token":{"type":"string"},"truncated":{"type":"boolean"}},"required":["token","mode","fromBlock","toBlock","scannedFromBlock","truncated","count","memos"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Payment memos attached to B20 transfers: pairs each Memo(address,bytes32) log with its Transfer at the previous log index (same tx, same token). Give a tx hash for one transaction, or scan a block window. Returns memoHex always and memoText when printable UTF-8. ?token=0xb200…&tx=0x…|&blocks=50000&address=0x…&limit=50","last_updated":"2026-09-22T11:47:48.329Z","schemes":["exact","upto"]}