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Live x402 APIs — pay per call in USDC | SWARM

https://swarm-agent.net/services/code-health
● healthy search

Six live x402 endpoints, $0.002 to $0.99: web research reports with linked sources, page reading, site checks, GitHub code-health scans and utilities. Pay per call in USDC on Base — no signup, no API key.

Category
search
Chains
base, eip155:8453
Price
$0.0020–$0.9900 USDC

Quality grade

How grading works
A 70.7 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
Payability 15.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 13.0 / 35
10 distinct payers, 48 USDC transfers in the last 30 days
Performance 8.6 / 10
Last probe answered in 452 ms (full marks at 200 ms or less)
Readiness 14.1 / 15
Agent readiness 94/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 18 h ago. On-chain activity last read 3 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

A · 94/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here A, 70.7/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 10/10 Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (452 ms).
x402 version 10/10 Speaks x402 v2.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 15/15 32/32 probes succeeded over 30 days (100%).
Resource declaration 10/10 Declares 6 paid resource(s).
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 5/5 seen in a source within 7 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 85 points, scaled to 100.
Responsiveness: Responsive (452 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness
Higher than 95% of peers
This listing 94 · peer median 78
Latency
Faster than 23% of peers
This listing 452 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.

How many agent tools actually work · All statistics

Paid endpoints

6 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

https://swarm-agent.net/services/code-health $0.0500 / call

SWARM Code Health - Static health check of a public GitHub repo: TODO/FIXME debt, oversized files, possible committed secrets, README/.gitignore/LICENSE. Requires `repo` (https://github.com/owner/name); repos over 25 MB are refused before payment. $0.05.

https://swarm-agent.net/services/read-page $0.0020 / call

SWARM Read Page - Retrieve the content of a URL as clean, LLM-ready text (headings with #, lists with -; menus, scripts, styles and markup removed). Use when an agent needs to read a web page, article or docs page without paying model tokens for raw HTML: on 15 public pages we measured, the text was a median 97% smaller than the HTML (about 67,000 fewer tokens per page). Requires `url`; HTML or text up to 3 MB. Not billed if the page cannot be read. $0.002.

https://swarm-agent.net/services/report $0.9900 / call

SWARM Research Report - Full Markdown report on any topic, researched on the live web, every claim linked to its source. Requires `topic`. 2-4 min (allow 360 s). Not billed if it fails. $0.99.

https://swarm-agent.net/services/site-check $0.0020 / call

SWARM Site Check - Website uptime and link check in one call: is a URL up, its HTTP status, final URL after redirects, response time and TLS/certificate errors. Use when an agent monitors sites on a schedule, verifies a link or domain is reachable before scraping or citing it, or needs to detect a non-200 answer or a broken redirect. Requires `url`. Instant, no AI. $0.002.

https://swarm-agent.net/services/summary $0.7500 / call

SWARM Research Brief - One-page brief on any topic, researched on the live web at request time, every source linked. Requires `topic`. 60-120 s (allow 180 s). Not billed if it fails. $0.75.

https://swarm-agent.net/services/utilities $0.0200 / call

SWARM Utilities - UUIDs, hashes, base64/URL encoding, secure passwords and timestamp conversion. Pick one with `op`. Instant, no AI. $0.02.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://swarm-agent.net/services/code-health  # expect HTTP 402 Payment Required (about $0.002/call)
/.well-known/x402.json
https://swarm-agent.net/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-09-25