Live scoring of x402 APIs — trust, uptime, latency and price from real traffic. Find the most reliable, cheapest source for any data, on Base or Solana.

x402radar API

Query live x402 API scores, uptime, latency, price and equivalents. Public, read-only, no API key. Built for agents that pick the best data source at runtime.

Base URLhttps://api.x402radar.io· set RADAR=https://api.x402radar.io for the examples below

GET/v1/radar/services

List scored APIs. The main directory feed.

category	string	Filter by category id (e.g. crypto-prices).
tag	string	Filter by a single tag.
sort	score \| price \| latency	Default score (then confidence).
order	asc \| desc	Sort direction (ignored for score).
window	1h \| 24h \| 7d	Metrics window. Default 24h.
limit	int (≤100)	Page size. Default 50.
offset	int	Pagination offset.

Example

curl "$RADAR/v1/radar/services?category=crypto-prices&sort=score&limit=20"

Response

{
  "window": "24h",
  "services": [
    {
      "id": "api.anchor-x402.com",
      "name": "Anchor",
      "categoryId": "onchain-data",
      "chains": ["base", "solana", "polygon"],
      "verified": true,
      "score": 86, "scoreConfidence": 74,
      "latencyP95Ms": 220, "uptimePct": 99,
      "medianPriceCredits": 1000,
      "sampleCount": 312, "syntheticCount": 48
    }
  ],
  "limit": 20, "offset": 0
}

GET/v1/radar/services/:id

Full detail for one API (host id): metrics for every window + equivalents.

Example

curl "$RADAR/v1/radar/services/api.anchor-x402.com"

Response

{
  "service": { "id": "api.anchor-x402.com", "name": "Anchor", "chains": ["base","solana"], ... },
  "metrics": [ { "window": "1h", ... }, { "window": "24h", ... }, { "window": "7d", ... } ],
  "alternatives": [ { "id": "pro-api.coingecko.com", "score": 82, ... } ]
}

GET/v1/radar/categories

All categories with active service counts.

Example

curl "$RADAR/v1/radar/categories"

Response

[ { "id": "crypto-prices", "name": "Crypto Prices", "serviceCount": 7 }, ... ]

GET/v1/radar/compare

Compare several APIs side by side.

ids	csv (≤20)	Comma-separated host ids.
window	1h \| 24h \| 7d	Metrics window. Default 24h.

Example

curl "$RADAR/v1/radar/compare?ids=api.exa.ai,blockrun.ai"

Response

{ "window": "24h", "services": [ { "id": "api.exa.ai", "score": 88, ... }, ... ] }

GET/v1/radar/alternatives

Ranked cheaper / more reliable equivalents in the same category. Powers smart fallback.

service	string	Host id to find alternatives for.
category	string	Or pass a category directly.
maxPrice	int (credits)	Only return equivalents at/under this price.
minScore	int	Minimum trust score. Default 50.
limit	int (≤25)	Default 5.

Example

curl "$RADAR/v1/radar/alternatives?service=api.exa.ai&maxPrice=7000"

Response

{ "services": [ { "id": "x402.tavily.com", "score": 84, "medianPriceCredits": 2000, ... } ] }

Scores combine uptime, success rate, latency, price (relative to category) and freshness, with a confidence level for cold-start APIs. Prices are in credits (1 USDC = 1,000,000 credits).