gpt.558686.xyz — agent-tools.cloud

Paid verification

No sponsored paid call yet.

Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.

Quality grade

How grading works

A 79.3 / 100

Availability 20.0 / 20

Endpoint responded (HTTP 200)

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 24.4 / 35

144 distinct payers, 10710 USDC transfers in the last 30 days; discounted because most transfers come from few payers

Performance 6.9 / 10

Last probe answered in 763 ms (full marks at 200 ms or less)

Readiness 13.0 / 15

Agent readiness 87/100

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

B · 87/100

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, 79.3/100), 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	20/25	Endpoint reachable; its 402 challenge was seen earlier (763 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	32/32 probes succeeded over 30 days (100%).
Resource declaration	10/10	Declares 14 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 75 points, scaled to 100.

Responsiveness: Responsive (763 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, bazaar_feed. 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 75% of peers; This listing 87 · peer median 78
Latency: Faster than 9% of peers; This listing 763 ms · peer median 205 ms

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

Live 402 challenge −5 — Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (763 ms).
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

14 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://gpt.558686.xyz/v1/chat

Enhanced AI chat completions with optimized system prompts, structured output support, and multi-model routing. OpenAI-compatible.

POST https://gpt.558686.xyz/v1/audit/code

Deep code audit covering security vulnerabilities, code quality, performance issues, and best practices. Returns structured report with severity ratings.

POST https://gpt.558686.xyz/v1/audit/contract

Exhaustive smart contract & DeFi protocol audit using GPT-6. Detects reentrancy, oracle manipulation, arithmetic flaws, flash loan vulnerabilities, access control holes, and EIP compliance.

POST https://gpt.558686.xyz/v1/data/insights

Analyze structured data (CSV, JSON, tables) and produce statistical insights, trends, anomalies, and actionable recommendations.

POST https://gpt.558686.xyz/v1/research

Multi-turn deep research report on any topic using GPT-6. Returns structured analysis with key findings, evidence, and actionable recommendations.

POST https://gpt.558686.xyz/v1/doc/summary

Intelligent document summarization with key points, keywords, and structured extraction. Supports any text document.

POST https://gpt.558686.xyz/v1/translate/pro

Professional-grade translation with terminology consistency, tone preservation, and optional glossary support.

POST https://gpt.558686.xyz/v1/extract/schema

Extracts high-fidelity JSON data conforming strictly to your JSON Schema from messy raw text, HTML, or unformatted data using GPT-6.

POST https://gpt.558686.xyz/v1/guard/prompt

Real-time prompt injection firewall and jailbreak detector for autonomous agents. Sanitizes untrusted user inputs from social feeds or web scrapers using GPT-6.

POST https://gpt.558686.xyz/v1/guard/tx

Pre-transaction safety analyzer and calldata decoder for autonomous agents. Evaluates smart contracts, approvals, drainers, and malicious traps using GPT-6 before on-chain execution.

POST https://gpt.558686.xyz/v1/chat/completions

Direct OpenAI-compatible /v1/chat/completions endpoint supporting gpt-6-sol, gpt-6-astra, gpt-5.5, gpt-5.6-sol, gpt-5.6-terra, and more. Plug-and-play for any AI SDK or Agent.

GET https://gpt.558686.xyz/v1/x402-ping

Canary ping and health verification endpoint for x402 networks and buyers ($0.002 USDC).

POST https://gpt.558686.xyz/v1/content/seo

Generate SEO-optimized long-form content with meta tags, headings structure, keyword integration, and readability optimization.

POST https://gpt.558686.xyz/v1/trial

Try the x402 payment flow for 1 cent. Get a quick AI response (max 150 tokens) via GPT-6. Perfect for testing agent-to-agent payments.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -sS -i -X GET https://gpt.558686.xyz  # expect HTTP 402 Payment Required (about $0.002/call)

/.well-known/x402.json

https://gpt.558686.xyz/.well-known/x402

Listed in

Directories this entry was found in.

cdp-bazaar since 2026-09-27