GPT55 Model Gateway

https://gpt55.558686.xyz/v1/chat/completions
down

Shares a payout wallet with 47 other endpoints — its adoption is attributed from that shared wallet's traffic, not earned exclusively.

GPT-5.6 Luna Standard chat is $0.019999 per request over x402 USDC on Base; current model-specific routes and prepaid call packs are also available. Market benchmark: the latest local x402.direct sample found AI-like listing prices with p25 around $0.01 and median around $0.03 per call; this gateway publishes GPT-5.6 Luna Standard at $0.019999 and model-specific prices at /pricing.json. GPT-5.6 Luna Standard is $0.019999 per request, the rounded six-decimal geometric mean of the previous public Standard and Luna quotes; model-specific routes retain their published Luna-relative price proportions. Service hub: https://gpt55.558686.xyz/x402/service and https://gpt55.558686.xyz/x402/service.json. Discovery assets: https://gpt55.558686.xyz/openapi.json, https://gpt55.558686.xyz/llms.txt, https://gpt55.558686.xyz/tools.json, https://gpt55.558686.xyz/apis.json, https://gpt55.558686.xyz/directory-submission.json. Agent and MCP metadata: https://gpt55.558686.xyz/.well-known/agent-card.json, https://gpt55.558686.xyz/.well-known/ai-catalog.json, https://gpt55.558686.xyz/.well-known/mcp/server-card.json, https://gpt55.558686.xyz/server.json. Integration hub: https://gpt55.558686.xyz/integrations and https://gpt55.558686.xyz/integrations.json. Best for agents that need one-call GPT-5.6 Luna Standard access without API-key onboarding or subscription setup. Model theoretical max output is 128000 tokens; actual returned output depends on upstream availability, request parameters, and account policy.

62
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

87.3% avg
0% 50% 100% Sep 7Sep 16Sep 26Oct 5

Response time

p50 318ms · p95 1191ms
0ms 250ms 500ms Sep 7Sep 16Sep 26Oct 5
Data table
Reliability history per time bucket over the last 30 days (daily).
Bucket Uptime Probes Response time
9/7/2026, 12:00:00 AM 100% 15 297ms
9/8/2026, 12:00:00 AM 100% 21 297ms
9/9/2026, 12:00:00 AM 100% 20 320ms
9/10/2026, 12:00:00 AM 100% 15 327ms
9/11/2026, 12:00:00 AM 100% 9 360ms
9/12/2026, 12:00:00 AM 100% 9 406ms
9/13/2026, 12:00:00 AM 100% 16 286ms
9/14/2026, 12:00:00 AM 100% 16 318ms
9/15/2026, 12:00:00 AM 100% 15 396ms
9/16/2026, 12:00:00 AM 100% 16 300ms
9/17/2026, 12:00:00 AM 100% 15 300ms
9/18/2026, 12:00:00 AM 100% 13 300ms
9/19/2026, 12:00:00 AM 100% 13 321ms
9/20/2026, 12:00:00 AM 100% 12 311ms
9/21/2026, 12:00:00 AM 100% 13 310ms
9/22/2026, 12:00:00 AM 100% 13 290ms
9/23/2026, 12:00:00 AM 100% 14 288ms
9/24/2026, 12:00:00 AM 100% 14 302ms
9/25/2026, 12:00:00 AM 100% 13 301ms
9/26/2026, 12:00:00 AM 93% 15 363ms
9/27/2026, 12:00:00 AM 100% 14 398ms
9/28/2026, 12:00:00 AM 100% 13 317ms
9/29/2026, 12:00:00 AM 100% 13 333ms
9/30/2026, 12:00:00 AM 100% 13 298ms
10/1/2026, 12:00:00 AM 100% 13 322ms
10/2/2026, 12:00:00 AM 38% 13 468ms
10/3/2026, 12:00:00 AM 0% 6 —
10/4/2026, 12:00:00 AM 0% 1 —
10/5/2026, 12:00:00 AM 0% 1 —
62
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
95

How often it was reachable when we probed it (weight 35%).

Latency
99

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
61

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
5

Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).

Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.

See the scoring methodology for exactly how each number is computed.

Payment

Currencies
USDC
Networks
base
Facilitator
self-hosted
SDK
unknown

Operator

Company
inferred — unknown
Jurisdiction
—
Registrar
Spaceship, Inc.
Domain registered
2025-12-09
Hosting network
CLOUDFLARENET
Hosting country
—

Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.

On-chain activity (base)

91
payments (30d)
21.49
USD volume (30d)
8
paying wallets (30d)

Payments per day

last payment 10/2/2026
0 20 40 Sep 7Sep 17Sep 28Oct 2
Data table
Settled payments per day.
Day Payments Volume (USD) Paying wallets
9/7/2026 2 0.01 1
9/9/2026 1 0 1
9/12/2026 7 0.01 1
9/14/2026 1 0 1
9/17/2026 1 0 1
9/19/2026 4 0.02 1
9/24/2026 1 0 1
9/26/2026 7 0.47 1
9/27/2026 34 9.58 1
9/28/2026 2 0.02 2
9/29/2026 18 11.21 2
9/30/2026 9 0.04 2
10/1/2026 2 0.02 1
10/2/2026 2 0.1 1

This payout wallet is shared: figures cover all 48 endpoints paid at it, since payments cannot be attributed to one of them. Only payments settled on chains and facilitators we index.

Linked by wallet — likely same operator

On-chain agent identity and the x402 endpoint that shares its settlement wallet.

https://gpt.558686.xyz/v1/trial x402 endpoint https://gpt.558686.xyz/v1/audit/contract x402 endpoint https://gpt.558686.xyz/v1/data/insights x402 endpoint https://gpt55.558686.xyz/slippage-sentinel/entrypoints/estimate_slippage/invoke x402 endpoint https://gpt.558686.xyz/v1/content/seo x402 endpoint https://gpt.558686.xyz/v1/research x402 endpoint https://gpt.558686.xyz/v1/doc/summary x402 endpoint https://gpt.558686.xyz/v1/x402-ping x402 endpoint https://gpt.558686.xyz/v1/translate/pro x402 endpoint https://gpt.558686.xyz/v1/guard/prompt x402 endpoint https://gpt.558686.xyz/v1/chat/completions x402 endpoint https://gpt.558686.xyz/v1/audit/code x402 endpoint https://gpt.558686.xyz/v1/extract/schema x402 endpoint https://gpt.558686.xyz/v1/chat x402 endpoint https://gpt.558686.xyz/v1/guard/tx x402 endpoint
Response schema 
{
  "additionalProperties": true,
  "properties": {
    "choices": {
      "type": "array"
    },
    "id": {
      "type": "string"
    },
    "model": {
      "type": "string"
    },
    "object": {
      "type": "string"
    },
    "usage": {
      "type": "object"
    }
  },
  "required": [
    "id",
    "object",
    "model",
    "choices"
  ],
  "type": "object"
}