Payment memos attached to B20 transfers
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
Not tested: has real-world effectsour last check, 2026-09-24
0 of 0checks answered this week
n/amedian answer time
$0.005listed price per call
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Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://agent402.tools/api/b20-memos
| Category | Market data |
|---|---|
| Provider host | agent402.tools |
| Networks | algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=, eip155:10, eip155:1329, eip155:137, eip155:143, eip155:42161, eip155:42220, eip155:43114, eip155:4663, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, stellar:pubnet |
| Payment schemes | exact, upto |
| Self-reported calls, 30 days | 6 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"blocks": 1000,
"token": "0xb200000000000000000000000000000000000001"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}