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
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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 |