# Nimbus Onchain Data API – Base Stablecoin Volume

> Nimbus Onchain Data API – Base Stablecoin Volume 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 2026-10-02).

Returns rolling-window on-chain stablecoin transfer volume metrics for the Base blockchain, including gross volume, circular volume estimates, and per-token breakdowns.

## Facts

- Endpoint: GET https://crypto-data-api-zo95.onrender.com/v1/base/stablecoin-volume?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nimbus-onchain-data-api-base-stablecoin-volume-908479b7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rpjd50MbRzOU0n8P7vAW0

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-stablecoin-volume-908479b7
```

Example prompt: What's the on-chain stablecoin transfer volume on Base right now — can you pull the last hour's gross and non-circular volume estimates broken down by token?

## When to prefer this

Choose this endpoint when you need current or recent on-chain stablecoin transfer volume specifically for the Base blockchain, with circular-flow deduplication built in. It is distinct from DEX trading volume APIs and is best suited for DeFi analysts, dashboard builders, or agents that need economic transfer activity (not swap volume) at 1h, 6h, or 24h granularity. Prefer alternatives if you need Ethereum mainnet, Solana, or other chains, or if you need historical time-series beyond the rolling window.

## Known failure modes

- Payment not submitted or rejected — endpoint returns HTTP 402 requiring USDC payment via x402 protocol
- Invalid window value (not 1h, 6h, or 24h) — likely returns a 400 or validation error
- Data pipeline lag exceeds 300 seconds — checks_run will show pipeline_fresh as failed
- Service unavailability (hosted on Render free tier) — possible cold-start latency or 503 errors
- Stale or delayed data — algorithmic estimates may not reflect real-time chain state

## 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

A JSON object containing the requested time window, per-token metrics (transfer count, gross_volume, circular_share_estimate, non_circular_volume_estimate), a summary transfer_volume block, pipeline freshness checks (checks_run array), a plain-text volume_definition, a generated_at_utc timestamp, and a disclaimer. Diagnostic fields like raw_transfer_volume and intra_tx_round_trip_volume are also included.

## 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": {
      "window": {
       "enum": [
        "1h",
        "6h",
        "24h"
       ],
       "type": "string",
       "default": "1h",
       "description": "Rolling window"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "checks_run": {
       "type": "array"
      },
      "disclaimer": {
       "type": "string"
      },
      "gross_volume": {
       "type": "number",
       "description": "Net token movement per transaction, counted once: net on-chain transfer volume, which includes lending, bridge and exchange flows and is not DEX trading volume."
      },
      "transfer_volume": {
       "type": "object",
       "description": "Summary block (market-check, stablecoin-volume, snapshots): gross_volume, non_circular_volume_estimate, non_circular_share_estimate and USD values. net on-chain transfer volume, which includes lending, bridge and exchange flows and is not DEX trading volume."
      },
      "generated_at_utc": {
       "type": "string"
      },
      "volume_definition": {
       "type": "string",
       "description": "Plain-text definition of the volume figures in this response."
      },
      "raw_transfer_volume": {
       "type": "number",
       "description": "Diagnostic only: sum of every Transfer leg (router hops, flash loans and LP moves included). Not a volume measure."
      },
      "circular_share_estimate": {
       "type": "number",
       "description": "circular_volume_estimate / gross_volume (0-1). Heuristic estimate."
      },
      "circular_volume_estimate": {
       "type": "number",
       "description": "Part of gross_volume matched as circular across transactions (round-trips, high-frequency bot churn, 3-hop cycles). Heuristic estimate."
      },
      "intra_tx_round_trip_volume": {
       "type": "number",
       "description": "Amount that cancels out
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "window": "1h",
  "per_token": {
   "USDC": {
    "transfers": 210000,
    "gross_volume": 123456789.12,
    "circular_share_estimate": 0.109,
    "non_circular_volume_estimate": 110000000.5
   }
  },
  "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-stablecoin-volume-908479b7/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)