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Model Access Gateway: pay-per-call LLM API in USDC (x402), no API key

https://modelaccessgateway.com/llm/claude-haiku-5.5
● healthy ai

LLM inference API: OpenAI-compatible chat completions for 136 AI models (Claude, GPT, Gemini, Grok, DeepSeek, Qwen, Kimi, GLM), paid per call in USDC on Base with x402. No account, no API key, automatic refund if the model fails.

Category
ai
Chains
base, eip155:8453
Price
$0.0010–$0.0067 USDC

Quality grade

How grading works
B 75.9 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 402)
Payability 20.0 / 20
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 15.9 / 40
11 distinct payers, 78 USDC transfers in the last 30 days
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 5 h ago. On-chain activity last read 2 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 · 91/100

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, 75.9/100), 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 (1055 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 15/15 30/30 probes succeeded over 30 days (100%).
Resource declaration 8/10 149 paid resources; 50 sampled lack a description.
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 75 points, scaled to 100.
Responsiveness: Responsive (1055 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. Display only: search order uses the quality grade.

Compared with peers

Against 10,060 reachable x402 APIs in our daily snapshot (2026-11-12 01:39 UTC). Display only; it does not change search order.

Readiness
Higher than 90% of peers
This listing 91 · peer median 78
Latency
Faster than 5% of peers
This listing 1,055 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.
  • Resource declaration −2 — Declare each paid resource with its input and output schema.
    Now: 149 paid resources; 50 sampled lack a description.

How many agent tools actually work · All statistics

Paid endpoints

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

POST https://modelaccessgateway.com/v1/chat/completions
POST https://modelaccessgateway.com/v1/data/base-receipt
POST https://modelaccessgateway.com/v1/data/base-usdc
POST https://modelaccessgateway.com/v1/data/lei
POST https://modelaccessgateway.com/v1/data/doi
POST https://modelaccessgateway.com/v1/data/dns
POST https://modelaccessgateway.com/v1/data/wikidata
POST https://modelaccessgateway.com/v1/data/company-check
POST https://modelaccessgateway.com/v1/data/academic-search
POST https://modelaccessgateway.com/v1/data/sec-company
POST https://modelaccessgateway.com/v1/search
POST https://modelaccessgateway.com/v1/chat/completions/deepseek%2Fdeepseek-chat
POST https://modelaccessgateway.com/llm/claude-opus-5.5
POST https://modelaccessgateway.com/llm/claude-sonnet-5.5
POST https://modelaccessgateway.com/llm/claude-haiku-5.5
POST https://modelaccessgateway.com/llm/gpt-6-astra
POST https://modelaccessgateway.com/llm/gpt-6.1-sol
POST https://modelaccessgateway.com/llm/gpt-5.5
POST https://modelaccessgateway.com/llm/gpt-6-luna
POST https://modelaccessgateway.com/llm/gemini-4-argon
POST https://modelaccessgateway.com/llm/gemini-3.1-pro
POST https://modelaccessgateway.com/llm/gemini-3.8-flash
POST https://modelaccessgateway.com/llm/grok-4.7
POST https://modelaccessgateway.com/llm/kimi-k3
POST https://modelaccessgateway.com/llm/glm-5.3
POST https://modelaccessgateway.com/llm/deepseek-v4-pro
POST https://modelaccessgateway.com/llm/deepseek-v4.1-flash
POST https://modelaccessgateway.com/llm/deepseek-chat
POST https://modelaccessgateway.com/llm/qwen3.8-max
POST https://modelaccessgateway.com/llm/minimax-m3
POST https://modelaccessgateway.com/llm/llama-3.3-70b
POST https://modelaccessgateway.com/llm/mistral-large-4
POST https://modelaccessgateway.com/llm/gpt-oss-120b
POST https://modelaccessgateway.com/llm/claude-opus-5
POST https://modelaccessgateway.com/llm/claude-sonnet-5
POST https://modelaccessgateway.com/llm/gemini-3.6-flash
POST https://modelaccessgateway.com/llm/aion-3.0
POST https://modelaccessgateway.com/llm/aion-3.0-mini
POST https://modelaccessgateway.com/llm/aion-3.5
POST https://modelaccessgateway.com/llm/aion-3.5-mini
POST https://modelaccessgateway.com/llm/claude-fable-5
POST https://modelaccessgateway.com/llm/claude-fable-5.1
POST https://modelaccessgateway.com/llm/claude-fable-5.2
POST https://modelaccessgateway.com/llm/claude-haiku-4.5
POST https://modelaccessgateway.com/llm/claude-opus-4.5
POST https://modelaccessgateway.com/llm/claude-opus-4.6
POST https://modelaccessgateway.com/llm/claude-opus-4.7
POST https://modelaccessgateway.com/llm/claude-opus-4.8
POST https://modelaccessgateway.com/llm/claude-opus-4.8-fast
POST https://modelaccessgateway.com/llm/claude-opus-5-fast

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X POST https://modelaccessgateway.com/llm/claude-haiku-5.5  # expect HTTP 402 Payment Required (about $0.001/call)
/.well-known/x402.json
https://modelaccessgateway.com/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-10-15