# x402 Pulse Price-Check

> x402 Pulse Price-Check is a paid API for AI agents from reactionpulse-production.reactionpulse-x402.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).

Returns price-benchmarking data for a given price point on the x402 marketplace, showing where it sits relative to endpoints that actually sell, with distribution stats and category-specific breakdowns.

## Facts

- Endpoint: GET https://reactionpulse-production.reactionpulse-x402.workers.dev/v1/x402/price-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-pulse-price-check-2852f660
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HECcMhrQ2RL3XTJRRVt_Q

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 x402-pulse-price-check-2852f660
```

Example prompt: Check whether $0.01 per call is a competitive price on x402 for the prices-market-data category — I want to see where I land relative to endpoints that actually have payers.

## When to prefer this

Use this endpoint when you need a fast, cheap, data-driven price benchmark specifically for x402 marketplace endpoints. It is the right choice when you want to know whether a specific price point will attract payers, compare against actual transaction data from CDP Bazaar, or get category-scoped distribution stats. Prefer this over generic SaaS pricing tools because it uses real x402 on-chain payment data, not survey estimates.

## Known failure modes

- Missing required 'price' query parameter returns an error
- Invalid price format (non-decimal string) may cause a parsing error
- Unknown category name may return empty or null scope data
- Data staleness flag set to true if CDP Bazaar feed is delayed beyond threshold
- Payment of $0.005 USDC required per call — unpaid requests receive HTTP 402

## How this service works

x402 Pulse: market intelligence and builder utilities for the x402 economy. What actually sells on x402, demand gaps, per-service traction checks, price benchmarks, payer wallet checks and a client self test, as cheap GET calls answered in under a second with explicit time information. Also on this host, ReactionPulse is an audience reaction and market research simulation for AI agents: it estimates how multiple stakeholder perspectives (customers, skeptical customers, developers, investors, competitors, early adopters, analysts, regulators, the market) would react to a product launch, announcement, price change, decision, news item, hypothesis or proposal, and returns sentiment analysis, objections, positive reactions, failure modes, market implications and recommended fixes. INPUT: JSON body {prompt (required, 8-6000 chars), context? (<=4000 chars), perspectives?[] (e.g. customer, skeptical_customer, developer, investor, competitor, early_adopter), audience?, output_language? (ISO code, default en)}. OUTPUT: strict JSON: overall_sentiment (0-100), positive_probability and negative_probability (0-1), controversy_score (0-100), perspectives[{role, stance, sentiment, headline, reasoning, top_concern, top_appeal}], likely_objections[], likely_positive_reactions[], failure_modes[{description, likelihood}], market_implications[], recommended_adjustments[], key_uncertainties[], confidence (0-1), input_integrity. TIERS: POST /v1/reaction = full analysis, 4-5 perspectives, $0.49 USDC; POST /v1/reaction/quick = 3 perspectives, compact lists, $0.15 USDC. Paid per call via x402 on Base; a free real sample is at GET /v1/example. LATENCY: full 15-30 s, quick 10-25 s (max 90 s; keep client timeouts at 120 s). LIMITATIONS: analytical LLM simulation, not a survey of real people; probabilities are estimates, not calibrated statistics; no web browsing (put relevant facts in context); one subject per call.

## Output

A JSON object containing the evaluated price, its inferred price band, percentile position vs selling endpoints, the price distribution (p25, median, p75, count) of selling endpoints in the same category or overall market, market observations about payer penetration in the band, and time metadata (data window, freshness, staleness flag).

## 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": [
      "price"
     ],
     "properties": {
      "price": {
       "type": "string",
       "description": "Price per call in USD, decimal (for example 0.01)"
      },
      "category": {
       "type": "string",
       "description": "Category name as returned by /v1/x402/market (for example prices-market-data). Optional: omit for the whole market."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "time": {
   "stale": false,
   "window": "trailing 30 days, as reported by the CDP Bazaar quality metrics",
   "data_as_of": "2026-09-22T06:40:00.000Z",
   "generated_at": "2026-09-22T12:00:00.000Z",
   "data_age_minutes": 320
  },
  "scope": "prices-market-data",
  "observations": [
   "34.6% of the 6777 endpoints priced in band $0.002-0.01 have 2+ payers (7.2% have 5+)."
  ],
  "your_band_usd": "0.002-0.01",
  "your_price_usd": 0.01,
  "selling_price_usd": {
   "n": 54,
   "p25": 0.002,
   "p75": 0.01,
   "median": 0.005
  },
  "position_vs_selling_endpoints": "median_to_p75"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-pulse-price-check-2852f660/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from reactionpulse-production.reactionpulse-x402.workers.dev](https://www.zero.xyz/host/reactionpulse-production.reactionpulse-x402.workers.dev/llms.txt)