# Ledgerpost — USDC Transfer History

> Ledgerpost — USDC Transfer History is a paid API for AI agents from oraclepost.higgsfield.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-19).

Returns the most recent USDC Transfer events (in and out) for any Base address, read live from on-chain event logs over the last ~600 blocks (~20 minutes).

## Facts

- Endpoint: GET https://oraclepost.higgsfield.app/api/transfers
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ledgerpost-usdc-transfer-history-cf690378
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3QNxQdYRpTVdjm0HYa-oW

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ledgerpost-usdc-transfer-history-cf690378
```

Example prompt: Pull the recent USDC transfer history for 0xAbC123...def456 on Base — I want to see all inbound and outbound transfers from roughly the last 20 minutes.

## When to prefer this

Choose this endpoint when you need live, uncached on-chain USDC transfer history for a specific Base address with no dependency on third-party data providers or indexers. It is ideal for payment verification, recent activity auditing, and monitoring use cases where freshness (last ~20 minutes) matters more than deep historical data. Prefer alternatives if you need historical data beyond 600 blocks or transfers of tokens other than USDC.

## Known failure modes

- Missing or malformed address parameter returns an error — address must be 0x-prefixed and 42 characters
- Public node rejects wide block range — the window narrows automatically but may return fewer than expected results
- Address with no USDC activity in the window returns an empty array
- Non-Base addresses or invalid EVM addresses will fail validation
- Node rate limits or downtime may cause intermittent failures

## How this service works

Recent USDC transfers in and out of any address on Base, read live from the chain (Transfer event logs over roughly the last ~600 blocks, about 20 minutes; the window narrows automatically if the public node rejects a wider range). Pass ?address=0x... . Returns up to 50 entries with block, tx hash, from, to, amount. No third-party API, no cache.

## Output

Returns up to 50 USDC Transfer log entries from the last ~600 Base blocks (~20 minutes), each containing: block number, transaction hash, sender address (from), recipient address (to), and USDC amount transferred. Results are read directly from on-chain event logs with no caching or third-party API intermediary.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "EVM address on Base, 0x-prefixed"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {}
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ledgerpost-usdc-transfer-history-cf690378/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oraclepost.higgsfield.app](https://www.zero.xyz/host/oraclepost.higgsfield.app/llms.txt)