C

Surf Inference — MPP Grade C

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On-chain Activity

52 Total txs
0 7d txs
$0.00 7d volume
$2.86 Total volume
2 Unique payers
0 Unique clients
7-day activity ▁▁▁▁▁▁▁

Compliance Checks

All paid ops declare 402 response MUST 10pt
All x-payment-info valid MUST 10pt
Challenge has Cache-Control: no-store MUST 5pt
Challenge digest on POST SHOULD 3pt
Challenge has expires SHOULD 3pt
Challenge has Problem Details SHOULD 2pt
Challenge has required params MUST 5pt
Challenge has WWW-Authenticate MUST 5pt
Challenge returns 402 MUST 10pt
Correct Content-Type MUST 5pt
Has Cache-Control on discovery SHOULD 5pt
Has input schemas SHOULD 5pt
Has llms.txt SHOULD 5pt
Has /openapi.json at root MUST 10pt
Has required top-level fields MUST 10pt
Served over HTTPS MUST 10pt
Uses standard categories SHOULD 2pt
2 issues
  • 402 response missing Cache-Control: no-store
  • POST endpoint challenge missing digest parameter (SHOULD per spec)

Paid Operations (1)

POST /v1/chat/completions dynamic
Chat completion

OpenAI-compatible chat completion endpoint with x402 or MPP payment. Supports streaming via SSE. Flat-priced models: qwen/qwen-2.5-7b-instruct ($0.001). Dynamic-priced models (scales with prompt size and max_tokens): moonshotai/kimi-k2.5, minimax/minimax-m2.7, z-ai/glm-5, x-ai/grok-4.1-fast, x-ai/grok-4.20-beta, x-ai/grok-4.20-multi-agent-beta, anthropic/claude-sonnet-4.5, anthropic/claude-sonnet-4.6, anthropic/claude-opus-4.5, anthropic/claude-opus-4.6. Search-enabled variants (include live X/Twitter + web search via xAI native tools): x-ai/grok-4.1-fast:online, x-ai/grok-4.20-beta:online, x-ai/grok-4.20-multi-agent-beta:online. Default max_tokens: 4096 when omitted.

Amount
dynamic
Currency
-
Method
x402, mpp
Intent
-
402 Declared
Yes
Non-standard x-payment-info fields: pricingMode: quote protocols: [x402 mpp]

Input Schema

{
  "$ref": "#/components/schemas/ChatCompletionBody"
}

Response Schema (200)

{
  "$ref": "#/components/schemas/ChatCompletionResponse"
}

Payment Methods

Methods
tempo (from challenge)
Intents
charge, session (from challenge)
Currencies (discovery)
-
Currency (challenge)
USDC.e on Tempo Mainnet Presto (Tempo Mainnet Presto)
Multiple Challenges
Yes

Recipients

  • 0x2BB201f1bb056eb738718BD7A3ad1BEF24b883bb
Per-endpoint breakdown
POST /v1/chat/completions
0x2BB201f1bb056eb738718BD7A3ad1BEF24b883bb

Security

TLS Version
TLSv1.3
Challenge ID Unique
Yes
Challenge ID Length
43
Digest Binding
-

Uptime

Discovery
Reachable (205ms)
Challenge
Reachable (119ms)
Last Checked

Schema Completeness

Paid Operations
1
With Input Schema
1
With Description
1

Documentation

Homepage
-
API Reference
-
llms.txt
-

Discovery

OpenAPI URL
https://inference.surf.cascade.fyi/openapi.json
OpenAPI Version
3.1.0
Service Version
1.0.0
Document Size
4795 bytes
Document Hash
f8dbce3af58e02d29afab8fab8af2114514193b58139668d8134ce171f6f554d

Version History (32 snapshots)

Grade: F (13%) → C (69%)
Grade: C (69%) → F (13%)
Scan snapshots
Date Grade Score Response Status
2026-04-06 C 69% 213ms Up
2026-04-07 C 69% 481ms Up
2026-04-08 C 69% 70ms Up
2026-04-09 C 69% 95ms Up
2026-04-10 C 69% 138ms Up
2026-04-11 C 69% 76ms Up
2026-04-12 C 69% 55ms Up
2026-04-13 C 69% 58ms Up
2026-04-14 C 69% 102ms Up
2026-04-15 C 69% 69ms Up
2026-04-16 C 69% 64ms Up
2026-04-17 C 69% 92ms Up
2026-04-18 C 69% 87ms Up
2026-04-19 C 69% 50ms Up
2026-04-20 C 69% 438ms Up
2026-04-21 C 69% 75ms Up
2026-04-22 C 69% 66ms Up
2026-04-23 C 69% 614ms Up
2026-04-24 C 69% 81ms Up
2026-04-25 C 69% 71ms Up
2026-04-26 C 69% 64ms Up
2026-04-27 C 69% 69ms Up
2026-04-28 C 69% 75ms Up
2026-04-29 C 69% 68ms Up
2026-04-30 C 69% 183ms Up
2026-05-01 C 69% 80ms Up
2026-05-02 C 69% 85ms Up
2026-05-03 C 69% 87ms Up
2026-05-04 C 69% 81ms Up
2026-05-05 C 69% 71ms Up
2026-05-06 C 69% 99ms Up
2026-05-07 C 69% 205ms Up