C
Sayer & Stone — MPP Grade C
commercejewelryfine-jewelrylab-grown
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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
1 issue
- Endpoint POST /purchase returned 400 (expected 402)
Paid Operations (1)
POST /purchase dynamic
Purchase a jewelry piece via multi-rail payment.
No identity headers required. Each payment rail (Tempo MPP, x402 Base, Solana MPP, Stripe SPT) authenticates via its own native credential. See /llms.txt for the full flow.
- Amount
- map[currency:USD max:5000.00 min:50.00 mode:dynamic]
- Currency
- -
- Method
- Intent
- -
- 402 Declared
- Yes
Non-standard x-payment-info fields:
authMode: payment price: map[currency:USD max:5000.00 min:50.00 mode:dynamic] protocols: [map[mpp:map[currency:0x20c000000000000000000000b9537d11c60e8b50 intent:charge method:tempo]] map[x402:map[asset:USDC client:agentscore-pay pay POST <url> --chain base network:base scheme:exact]] map[mpp:map[client:agentscore-pay pay POST <url> --chain solana currency:EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v intent:charge method:solana]] map[mpp:map[currency:usd intent:charge method:stripe]]]
Input Schema
| Field | Type | Required | Description |
|---|---|---|---|
| string (email) | Yes | ||
| gift_note | string | No | Optional personal note to print on a card. Plain text only (no HTML/markdown). Newlines (\n) are preserved. If the buyer is sending as a gift, ASK them first and include an opening + signature in the note text. Omit for non-gift orders. |
| options | object | No | Map of option name to canonical value (e.g. {"length":"7 inches","metal":"14K rose gold"}). |
| order_id | string (uuid) | No | Resume a pending order after identity verification |
| product_slug | string | No | Parent product slug. Pair with `options`. |
| quantity | integer | Yes | |
| shipping | object | Yes | |
| sku | string | No | Variant SKU from GET /catalog. Exclusive with product_slug+options. |
Payment Methods
- Methods
- -
- Intents
- -
- Currencies (discovery)
- -
- Multiple Challenges
- No
Security
- TLS Version
- TLSv1.3
- Challenge ID Unique
- -
- Challenge ID Length
- -
- Digest Binding
- -
Uptime
- Discovery
- Reachable (2889ms)
- Challenge
- Reachable (1493ms)
- Last Checked
Schema Completeness
- Paid Operations
- 1
- With Input Schema
- 1
- With Description
- 1
Documentation
- Homepage
- https://www.sayerandstone.com
- API Reference
- https://agents.sayerandstone.com/.well-known/mpp.json
- llms.txt
- https://agents.sayerandstone.com/llms.txt reachable
Discovery
- OpenAPI URL
- https://agents.sayerandstone.com/openapi.json
- OpenAPI Version
- 3.1.0
- Service Version
- 1.0.0
- Document Size
- 10466 bytes
- Document Hash
- e126ea47dc895117108ba8e5772df09f29afbd96b9d5228ee52e41d4f4d1f685
Version History (31 snapshots)
- document hash changed (no semantic differences detected)
Scan snapshots
| Date | Grade | Score | Response | Status |
|---|---|---|---|---|
| 2026-05-21 | C | 70% | 894ms | Up |
| 2026-05-22 | C | 70% | 656ms | Up |
| 2026-05-23 | C | 70% | 1048ms | Up |
| 2026-05-24 | C | 70% | 1049ms | Up |
| 2026-05-25 | C | 70% | 790ms | Up |
| 2026-05-26 | C | 70% | 727ms | Up |
| 2026-05-27 | C | 70% | 563ms | Up |
| 2026-05-28 | C | 70% | 796ms | Up |
| 2026-05-29 | C | 70% | 556ms | Up |
| 2026-05-30 | C | 70% | 569ms | Up |
| 2026-05-31 | C | 70% | 577ms | Up |
| 2026-06-01 | C | 70% | 826ms | Up |
| 2026-06-02 | C | 70% | 649ms | Up |
| 2026-06-03 | C | 70% | 560ms | Up |
| 2026-06-04 | C | 70% | 584ms | Up |
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| 2026-06-06 | C | 70% | 533ms | Up |
| 2026-06-07 | C | 70% | 805ms | Up |
| 2026-06-08 | C | 70% | 1056ms | Up |
| 2026-06-09 | C | 70% | 2836ms | Up |
| 2026-06-10 | C | 70% | 564ms | Up |
| 2026-06-11 | C | 70% | 656ms | Up |
| 2026-06-12 | C | 70% | 1339ms | Up |
| 2026-06-13 | C | 70% | 685ms | Up |
| 2026-06-14 | C | 70% | 568ms | Up |
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| 2026-06-16 | C | 70% | 498ms | Up |
| 2026-06-17 | C | 70% | 839ms | Up |
| 2026-06-18 | C | 70% | 605ms | Up |
| 2026-06-19 | C | 70% | 1034ms | Up |
| 2026-06-20 | C | 70% | 545ms | Up |