# Base Pulse Spot Price

> Base Pulse Spot Price is a paid API for AI agents from base-pulse.annushka1190.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns a multi-source spot price for a token with a confidence score, sourced from public data on Base

## Facts

- Endpoint: GET https://base-pulse.annushka1190.workers.dev/v1/price/spot
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-pulse-spot-price-43c24d6e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oYSceEhKw8G1ZSgJX4Hv7

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 base-pulse-spot-price-43c24d6e
```

Example prompt: What's the current spot price of ETH right now, including how confident the data source is?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call USD spot price for a token on Base without requiring API key setup, and you want an accompanying confidence score to gauge data reliability. Ideal for pre-trade checks, DeFi agent workflows, or portfolio valuation on Base where you want multi-source aggregation rather than a single exchange feed.

## Known failure modes

- Unknown or unsupported token symbol returns an error or empty result
- Network or upstream data source unavailability may cause stale or missing prices
- Confidence score may be low for illiquid or obscure tokens
- Payment failure via x402 results in 402 response before data is returned
- Missing 'symbol' query parameter may return a default or error response

## How this service works

Pay-per-call market intel and data tools for AI agents: trending Base tokens with momentum/risk scores, live token scoring, multi-source spot prices, Base gas tips, wallet intel, x402 merchant reliability checks, DefiLlama TVL, GitHub trending repos, RSS feed digests, and WHOIS domain lookups. Built from free public data — no API keys for callers. USDC via x402 on Base and Solana.

## Output

A JSON object containing the queried token symbol, its current USD spot price aggregated from multiple public sources, and a confidence score (0-1) reflecting data quality and source agreement.

## 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": {
     "enum": [
      "GET"
     ]
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "symbol": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "symbol": "ETH",
  "price_usd": 3120.5,
  "confidence": 0.95
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-pulse-spot-price-43c24d6e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base-pulse.annushka1190.workers.dev](https://www.zero.xyz/host/base-pulse.annushka1190.workers.dev/llms.txt)