B
StableKey — MPP Grade B
Preview responses and set spending limits for this service through use.mpp.land
Free budget controls, response samples, and reliability routing.
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
1 issue
- POST endpoint challenge missing digest parameter (SHOULD per spec)
Paid Operations (1)
POST /api/process dynamic
Create a paid CorridorKey video keying job. Requires a StableUpload rgbUrl + reserved output slots. hintUrl is optional — when omitted, stablekey generates a chroma hint inline (D6).
- Amount
- map[currency:USD max:5.00 min:0.05 mode:dynamic]
- Currency
- -
- Method
- Intent
- -
- 402 Declared
- Yes
Non-standard x-payment-info fields:
price: map[currency:USD max:5.00 min:0.05 mode:dynamic] protocols: [map[x402:map[]] map[mpp:map[currency:0x20c0000000000000000000000000000000000001 intent:charge method:tempo]]]
Input Schema
| Field | Type | Required | Description |
|---|---|---|---|
| clientRequestId | string | No | |
| declared | object | Yes | |
| hintUrl | string (uri) | No | OPTIONAL StableUpload public URL of a coarse alpha hint mp4. When omitted, stablekey generates a chroma-key hint inline (works on clean studio plates). Bring your own SAM-derived mask via stablesam.dev for gnarly shots: subject wearing green, busy non-green BG props, multiple subjects, translucent FG. |
| options | object | No | |
| outputs | object | Yes | |
| rgbUrl | string (uri) | Yes | StableUpload public URL of the source RGB plate (mp4). |
| type | string | Yes |
Response Schema (200)
| Field | Type | Description |
|---|---|---|
| deduplicated | boolean | - |
| jobId | string | - |
| price | string | - |
| status | string | - |
| type | string | - |
Payment Methods
- Methods
- tempo (from challenge)
- Intents
- charge (from challenge)
- Currencies (discovery)
- -
- Currency (challenge)
- USDC.e on Tempo (Tempo)
- Multiple Challenges
- No
Recipients
- 0xF6fBf87BdfB523ACCB5d82727297713FB849ce44
Per-endpoint breakdown
- POST /api/process
- 0xF6fBf87BdfB523ACCB5d82727297713FB849ce44
Security
- TLS Version
- TLSv1.3
- Challenge ID Unique
- Yes
- Challenge ID Length
- 43
- Digest Binding
- -
Uptime
- Discovery
- Reachable (183ms)
- Challenge
- Reachable (287ms)
- Last Checked
Schema Completeness
- Paid Operations
- 1
- With Input Schema
- 1
- With Description
- 1
Documentation
- Homepage
- -
- API Reference
- -
- llms.txt
- -
Discovery
- OpenAPI URL
- https://stablekey.dev/openapi.json
- OpenAPI Version
- 3.1.0
- Service Version
- 0.1.0
- Document Size
- 38110 bytes
- Document Hash
- 443247d6666c9b6047387b390383e0b97a725bac6c34e2a42307bd3caad2561e
Version History (1 snapshots)
- document hash changed (no semantic differences detected)
Scan snapshots
| Date | Grade | Score | Response | Status |
|---|---|---|---|---|
| 2026-04-27 | B | 79% | 3130ms | Up |