# Transferlog — USDC Transfer History on Base

> Transferlog — USDC Transfer History on Base is a paid API for AI agents from oraclepost.higgsfield.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-17).

Fetches recent USDC Transfer event logs (last ~600 blocks, ~20 min) for any Base address, returning up to 50 inbound and outbound transfer records read live from the chain.

## Facts

- Endpoint: GET https://oraclepost.higgsfield.app/api/premium/transfers
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/transferlog-usdc-transfer-history-on-base-58aeab1b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3LQhTef4LBblX9NiD0xbc

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 transferlog-usdc-transfer-history-on-base-58aeab1b
```

Example prompt: Can you pull the recent USDC transfers for the Base address 0x4a2b...f9c3 — I want to see what came in and went out in the last 20 minutes or so?

## When to prefer this

Choose this endpoint when you need live, uncached, on-chain USDC transfer history for a specific Base address without relying on a third-party indexer or API key. It is ideal for real-time payment verification, quick wallet audits, or agent workflows that need trustless confirmation of recent USDC flows. Prefer it over indexer APIs when recency (last ~20 min) and raw chain truth matter more than deep historical coverage.

## Known failure modes

- Public node rejects wide block range — window narrows automatically but may return fewer results
- Invalid or malformed address (non-0x-prefixed or wrong length) — likely returns error or empty result
- No transfers found in the window — returns empty list, not an error
- Public node rate limiting or downtime — request may fail or time out
- Very active addresses may hit the 50-entry cap, truncating older transfers within the window

## 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 event entries from roughly the last 600 Base blocks (~20 minutes), each including block number, transaction hash, sender address, recipient address, and USDC amount. Data is read live from a public Base node with no caching or third-party 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/transferlog-usdc-transfer-history-on-base-58aeab1b/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)