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Echo Router

https://echo.router.merit.systems/images/generations
● healthy ai

Monetize AI Apps in Minutes

Category
ai
Chains
base
Price
$0.0003–$0.5000 USDC

Quality grade

How grading works
B+ 65.0 / 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 8.6 / 35
4 distinct payers, 11 USDC transfers in the last 30 days
Performance 8.2 / 10
Last probe answered in 521 ms (full marks at 200 ms or less)
Readiness 13.2 / 15
Agent readiness 88/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 20 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

B · 88/100

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 B+, 65.0/100), 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 (521 ms).
x402 version 5/10 Speaks x402 v1; v2 is current.
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 9 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 (521 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 85% of peers
This listing 88 · peer median 78
Latency
Faster than 17% of peers
This listing 521 ms · peer median 205 ms

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

  • x402 version −5 — Support the current protocol revision.
    Now: Speaks x402 v1; v2 is current.
  • 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

9 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://echo.router.merit.systems/

Echo x402

https://echo.router.merit.systems/chat/completions

Generates conversational AI responses using various language models. Supports streaming, function calling, and multi-turn conversations with customizable parameters.

https://echo.router.merit.systems/images/generations $0.3128 / call

Creates images using OpenAI's image generation models. Supports text-to-image generation with customizable size, quality, and style parameters.

https://echo.router.merit.systems/resource/e2b/execute $0.0003 / call

Executes code in secure sandboxed environments using E2B. Supports multiple programming languages with isolated execution and real-time output capture.

https://echo.router.merit.systems/resource/tavily/crawl $0.1200 / call

Crawls websites and extracts content using Tavily's web crawler. Retrieves and processes multiple pages from a domain with configurable depth and filters.

https://echo.router.merit.systems/resource/tavily/extract $0.0080 / call

Extracts structured content from web pages using Tavily. Cleans and processes raw HTML into readable, structured text data.

https://echo.router.merit.systems/resource/tavily/search $0.0080 / call

Performs web searches using Tavily's search API. Returns relevant search results with content snippets and metadata for research and information retrieval.

https://echo.router.merit.systems/v1/videos $0.5000 / call

Generates videos using OpenAI's video generation models. Accepts various parameters to customize video output including prompts and configuration options.

https://echo.router.merit.systems/videos

Generates videos using OpenAI's video generation models. Accepts various parameters to customize video output including prompts and configuration options.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://echo.router.merit.systems/images/generations  # expect HTTP 402 Payment Required (about $0.00028/call)
/.well-known/x402.json
https://echo.router.merit.systems/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-05-22