GPT55 Model Gateway

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

Shares a payout wallet with 33 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.

65
reliability

Reliability & health

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

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Thu 1 PMSat 8 PMTue 4 AMThu 11 AM

Response time

p50 460ms · p95 5494ms
0ms 4200ms 8400ms Thu 1 PMSat 8 PMTue 4 AMThu 11 AM
Data table
Reliability history per time bucket over the last 7 days (hourly).
Bucket Uptime Probes Response time
8/13/2026, 1:00:00 PM 100% 1 464ms
8/13/2026, 2:00:00 PM 100% 1 376ms
8/13/2026, 3:00:00 PM 100% 1 995ms
8/13/2026, 4:00:00 PM 100% 1 816ms
8/13/2026, 5:00:00 PM 100% 1 471ms
8/13/2026, 7:00:00 PM 100% 1 545ms
8/13/2026, 8:00:00 PM 100% 1 348ms
8/13/2026, 9:00:00 PM 100% 1 312ms
8/13/2026, 10:00:00 PM 100% 1 370ms
8/13/2026, 11:00:00 PM 100% 1 340ms
8/14/2026, 12:00:00 AM 100% 1 339ms
8/14/2026, 2:00:00 AM 100% 1 698ms
8/14/2026, 3:00:00 AM 100% 1 343ms
8/14/2026, 4:00:00 AM 100% 1 376ms
8/14/2026, 5:00:00 AM 100% 1 2566ms
8/14/2026, 6:00:00 AM 100% 1 351ms
8/14/2026, 7:00:00 AM 100% 1 704ms
8/14/2026, 9:00:00 AM 100% 1 356ms
8/14/2026, 10:00:00 AM 100% 1 344ms
8/14/2026, 11:00:00 AM 100% 1 329ms
8/14/2026, 12:00:00 PM 100% 1 7458ms
8/14/2026, 1:00:00 PM 100% 1 320ms
8/14/2026, 2:00:00 PM 100% 1 5457ms
8/14/2026, 3:00:00 PM 100% 1 611ms
8/14/2026, 5:00:00 PM 100% 1 474ms
8/14/2026, 6:00:00 PM 100% 1 441ms
8/14/2026, 7:00:00 PM 100% 1 482ms
8/14/2026, 8:00:00 PM 100% 1 327ms
8/14/2026, 9:00:00 PM 100% 1 322ms
8/14/2026, 10:00:00 PM 100% 1 6722ms
8/14/2026, 11:00:00 PM 100% 1 341ms
8/15/2026, 12:00:00 AM 100% 1 344ms
8/15/2026, 1:00:00 AM 100% 1 317ms
8/15/2026, 3:00:00 AM 100% 1 333ms
8/15/2026, 4:00:00 AM 100% 1 461ms
8/15/2026, 5:00:00 AM 100% 1 2171ms
8/15/2026, 6:00:00 AM 100% 1 631ms
8/15/2026, 7:00:00 AM 100% 1 680ms
8/15/2026, 8:00:00 AM 100% 1 477ms
8/15/2026, 9:00:00 AM 100% 1 366ms
8/15/2026, 10:00:00 AM 100% 1 587ms
8/15/2026, 12:00:00 PM 100% 1 340ms
8/15/2026, 1:00:00 PM 100% 1 1739ms
8/15/2026, 2:00:00 PM 100% 1 467ms
8/15/2026, 3:00:00 PM 100% 1 482ms
8/15/2026, 4:00:00 PM 100% 1 442ms
8/15/2026, 5:00:00 PM 100% 1 368ms
8/15/2026, 7:00:00 PM 100% 1 325ms
8/15/2026, 8:00:00 PM 100% 1 462ms
8/15/2026, 9:00:00 PM 100% 1 319ms
8/15/2026, 10:00:00 PM 100% 1 480ms
8/15/2026, 11:00:00 PM 100% 1 328ms
8/16/2026, 12:00:00 AM 100% 1 461ms
8/16/2026, 2:00:00 AM 100% 1 308ms
8/16/2026, 3:00:00 AM 100% 1 441ms
8/16/2026, 4:00:00 AM 100% 1 318ms
8/16/2026, 5:00:00 AM 100% 1 352ms
8/16/2026, 6:00:00 AM 100% 1 589ms
8/16/2026, 7:00:00 AM 100% 1 797ms
8/16/2026, 9:00:00 AM 100% 1 346ms
8/16/2026, 10:00:00 AM 100% 1 697ms
8/16/2026, 11:00:00 AM 100% 1 466ms
8/16/2026, 12:00:00 PM 100% 1 478ms
8/16/2026, 1:00:00 PM 100% 1 336ms
8/16/2026, 2:00:00 PM 100% 1 901ms
8/16/2026, 4:00:00 PM 100% 1 460ms
8/16/2026, 5:00:00 PM 100% 1 472ms
8/16/2026, 6:00:00 PM 100% 1 361ms
8/16/2026, 7:00:00 PM 100% 1 353ms
8/16/2026, 8:00:00 PM 100% 1 369ms
8/16/2026, 9:00:00 PM 100% 1 362ms
8/16/2026, 11:00:00 PM 100% 1 473ms
8/17/2026, 12:00:00 AM 100% 1 506ms
8/17/2026, 1:00:00 AM 100% 1 8360ms
8/17/2026, 2:00:00 AM 100% 1 445ms
8/17/2026, 3:00:00 AM 100% 1 367ms
8/17/2026, 4:00:00 AM 100% 1 1310ms
8/17/2026, 6:00:00 AM 100% 1 608ms
8/17/2026, 7:00:00 AM 100% 1 439ms
8/17/2026, 8:00:00 AM 100% 1 484ms
8/17/2026, 9:00:00 AM 100% 1 464ms
8/17/2026, 10:00:00 AM 100% 1 341ms
8/17/2026, 11:00:00 AM 100% 1 335ms
8/17/2026, 1:00:00 PM 100% 1 473ms
8/17/2026, 2:00:00 PM 100% 1 331ms
8/17/2026, 3:00:00 PM 100% 1 423ms
8/17/2026, 4:00:00 PM 100% 1 458ms
8/17/2026, 5:00:00 PM 100% 1 485ms
8/17/2026, 6:00:00 PM 100% 1 440ms
8/17/2026, 7:00:00 PM 100% 1 471ms
8/17/2026, 9:00:00 PM 100% 1 369ms
8/17/2026, 10:00:00 PM 100% 1 5696ms
8/17/2026, 11:00:00 PM 100% 1 479ms
8/18/2026, 12:00:00 AM 100% 1 454ms
8/18/2026, 1:00:00 AM 100% 1 5503ms
8/18/2026, 2:00:00 AM 100% 1 335ms
8/18/2026, 4:00:00 AM 100% 1 365ms
8/18/2026, 5:00:00 AM 100% 1 8125ms
8/18/2026, 6:00:00 AM 100% 1 821ms
8/18/2026, 7:00:00 AM 100% 1 778ms
8/18/2026, 8:00:00 AM 100% 1 6177ms
8/18/2026, 9:00:00 AM 100% 1 467ms
8/18/2026, 11:00:00 AM 100% 1 490ms
8/18/2026, 12:00:00 PM 100% 1 854ms
8/18/2026, 1:00:00 PM 100% 1 337ms
8/18/2026, 2:00:00 PM 100% 1 469ms
8/18/2026, 3:00:00 PM 100% 1 475ms
8/18/2026, 4:00:00 PM 100% 1 460ms
8/18/2026, 6:00:00 PM 100% 1 461ms
8/18/2026, 7:00:00 PM 100% 1 367ms
8/18/2026, 8:00:00 PM 100% 1 496ms
8/18/2026, 9:00:00 PM 100% 1 323ms
8/18/2026, 10:00:00 PM 100% 1 431ms
8/18/2026, 11:00:00 PM 100% 1 326ms
8/19/2026, 1:00:00 AM 100% 1 446ms
8/19/2026, 2:00:00 AM 100% 1 441ms
8/19/2026, 3:00:00 AM 100% 1 332ms
8/19/2026, 4:00:00 AM 100% 1 346ms
8/19/2026, 5:00:00 AM 100% 1 360ms
8/19/2026, 6:00:00 AM 100% 1 489ms
8/19/2026, 8:00:00 AM 100% 1 344ms
8/19/2026, 9:00:00 AM 100% 1 5505ms
8/19/2026, 10:00:00 AM 100% 1 506ms
8/19/2026, 11:00:00 AM 100% 1 335ms
8/19/2026, 12:00:00 PM 100% 1 314ms
8/19/2026, 1:00:00 PM 100% 1 696ms
8/19/2026, 3:00:00 PM 100% 1 456ms
8/19/2026, 4:00:00 PM 100% 1 338ms
8/19/2026, 5:00:00 PM 100% 1 472ms
8/19/2026, 6:00:00 PM 100% 1 456ms
8/19/2026, 7:00:00 PM 100% 1 434ms
8/19/2026, 8:00:00 PM 100% 1 468ms
8/19/2026, 9:00:00 PM 100% 1 423ms
8/19/2026, 10:00:00 PM 100% 1 540ms
8/20/2026, 12:00:00 AM 100% 1 322ms
8/20/2026, 1:00:00 AM 100% 1 580ms
8/20/2026, 2:00:00 AM 100% 1 320ms
8/20/2026, 3:00:00 AM 100% 1 462ms
8/20/2026, 4:00:00 AM 100% 1 318ms
8/20/2026, 5:00:00 AM 100% 1 565ms
8/20/2026, 7:00:00 AM 100% 1 604ms
8/20/2026, 8:00:00 AM 100% 1 427ms
8/20/2026, 9:00:00 AM 100% 1 1558ms
8/20/2026, 10:00:00 AM 100% 1 514ms
8/20/2026, 11:00:00 AM 100% 1 481ms
65
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

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

Latency
94

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
14

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)

112
payments (30d)
4.55
USD volume (30d)
8
paying wallets (30d)

Payments per day

last payment 8/18/2026
0 15 30 Jul 22Jul 28Aug 12Aug 18
Data table
Settled payments per day.
Day Payments Volume (USD) Paying wallets
7/22/2026 4 0.01 1
7/23/2026 2 0 1
7/25/2026 14 2.18 2
7/26/2026 14 0.05 2
7/27/2026 26 0.1 2
7/28/2026 23 2.14 1
7/30/2026 4 0.01 1
8/5/2026 1 0 1
8/6/2026 3 0.01 1
8/9/2026 1 0 1
8/10/2026 2 0 1
8/12/2026 6 0.01 2
8/13/2026 1 0.01 1
8/14/2026 2 0 1
8/15/2026 1 0 1
8/16/2026 1 0 1
8/18/2026 7 0.01 1

This payout wallet is shared: figures cover all 34 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://gpt55.558686.xyz/v1/tools/url-metadata x402 endpoint https://gpt55.558686.xyz/v1/paid/evm-transaction-risk-decoder x402 endpoint https://gpt55.558686.xyz/v1/x402-ping x402 endpoint https://gpt55.558686.xyz/slippage-sentinel/entrypoints/estimate_slippage/invoke x402 endpoint https://x402-seller.558686.xyz/v1/tools/x402-quote-inspector x402 endpoint https://gpt55.558686.xyz/v1/chat/completions/metered x402 endpoint https://x402-key.558686.xyz/v1/tools/api-url-readiness-check 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"
}