# Nimbus Onchain Data API – Base Large Transfers

> Nimbus Onchain Data API – Base Large Transfers is a paid API for AI agents from crypto-data-api-zo95.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-30).

Returns large token transfers on the Base blockchain above a specified USD threshold, sourced from public on-chain data.

## Facts

- Endpoint: GET https://crypto-data-api-zo95.onrender.com/v1/base/large-transfers?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nimbus-onchain-data-api-base-large-transfers-5421bf4f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4aBt7WtE9TBV-ryAGMB2P

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 nimbus-onchain-data-api-base-large-transfers-5421bf4f
```

Example prompt: Show me all large token transfers on Base above $500,000 from the last few minutes — I want to see which wallets are moving big amounts and what tokens they're using.

## When to prefer this

Choose this endpoint when you need recent large token transfer data specifically on the Base blockchain, filtered by a minimum USD value, and are comfortable with algorithmic estimates from public on-chain data. It is well-suited for whale monitoring, DeFi flow analysis, and on-chain due diligence at low per-call cost ($0.01 USDC). Prefer alternatives if you need historical depth beyond recent data, cross-chain coverage, or guaranteed data accuracy with SLA.

## Known failure modes

- Invalid min_usd format (must be 5–12 digit numeric string matching ^[0-9]{5,12}$) returns a validation error
- Payment not processed via x402 results in HTTP 402 before data is returned
- Data pipeline lag exceeds 300 seconds causing stale or missing results (checks_run will flag pipeline_fresh as failed)
- Service may be unavailable without notice as it is hosted on Render free tier
- No refunds issued if the call fails after payment is captured on-chain

## How this service works

x402 pay-per-call. Payments are per request in USDC and are final. No refunds on-chain. Service is provided as-is and may change or stop without notice. Informational data only, not financial, investment, legal, or tax advice. Metrics such as net transfer volume estimates and wallet clusters are algorithmic estimates from public blockchain data and may be wrong or delayed. Provided as-is with no warranty. Methodology: https://crypto-data-api-zo95.onrender.com/methodology.

## Output

Returns a JSON object containing a list of large transfers on Base (each with from/to addresses, transaction hash, token symbol, USD amount, and UTC timestamp), the applied minimum USD threshold, a count of results, data freshness pipeline checks, a generated_at timestamp, and a disclaimer. Transfers are algorithmic estimates from public blockchain data and may be delayed up to 300 seconds.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "min_usd": {
       "type": "string",
       "pattern": "^[0-9]{5,12}$",
       "description": "Minimum USD amount (50000-1e12)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "checks_run": {
       "type": "array"
      },
      "disclaimer": {
       "type": "string"
      },
      "generated_at_utc": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 2,
  "min_usd": 100000,
  "transfers": [
   {
    "to": "0x...",
    "tx": "0x...",
    "from": "0x...",
    "token": "USDC",
    "time_utc": "2026-09-29T19:30:01Z",
    "amount_usd": 250000
   }
  ],
  "checks_run": [
   {
    "id": "pipeline_fresh",
    "ran": true,
    "passed": true,
    "description": "Ingested data lag under 300s"
   }
  ],
  "disclaimer": "Informational data only, ...",
  "generated_at_utc": "2026-09-29T19:40:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nimbus-onchain-data-api-base-large-transfers-5421bf4f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto-data-api-zo95.onrender.com](https://www.zero.xyz/host/crypto-data-api-zo95.onrender.com/llms.txt)