StableMerch API

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 (2)

POST /api/shirt dynamic

Custom shirt from your image. Base price: $20. Commission (if provided) is added on top.

Amount: map[currency:USD max:40.00 min:20.00 mode:dynamic]
Currency: -
Method
Intent: -
402 Declared: Yes

Non-standard x-payment-info fields: price: map[currency:USD max:40.00 min:20.00 mode:dynamic] protocols: [map[x402:map[]] map[mpp:map[currency:0x20c0000000000000000000000000000000000001 intent:charge method:tempo]]]

Input Schema

Field	Type	Required	Description
address_to	object	Yes
color	string	No	enum: Black, White default: `White`
commission_address	string	No	EVM address to receive the commission. Must be provided together with commission_rate.
commission_rate	number	No	Commission as a decimal (e.g. 0.1 = 10%). Added on top of the base price — the buyer pays base + (base × rate).
imageUrl	string	Yes	HTTP/HTTPS URL or base64 data URL (data:image/...)
size	string	No	enum: S, M, L, XL, 2XL, 3XL, 4XL, 5XL default: `XL`

Response Schema (200)

Field	Type	Description
id	string (uuid)	-
imageUrl	string	HTTP/HTTPS URL or base64 data URL (data:image/...)
orderId	string	-
productId	string	-
status	string	-
trackingInfo		-

POST /api/mug dynamic

Custom mug from your image. Base price: $15. Commission (if provided) is added on top.

Amount: map[currency:USD max:25.00 min:15.00 mode:dynamic]
Currency: -
Method
Intent: -
402 Declared: Yes

Non-standard x-payment-info fields: price: map[currency:USD max:25.00 min:15.00 mode:dynamic] protocols: [map[x402:map[]] map[mpp:map[currency:0x20c0000000000000000000000000000000000001 intent:charge method:tempo]]]

Input Schema

Field	Type	Required	Description
address_to	object	Yes
commission_address	string	No	EVM address to receive the commission. Must be provided together with commission_rate.
commission_rate	number	No	Commission as a decimal (e.g. 0.1 = 10%). Added on top of the base price — the buyer pays base + (base × rate).
imageUrl	string	Yes	HTTP/HTTPS URL or base64 data URL (data:image/...)

Response Schema (200)

Field	Type	Description
id	string (uuid)	-
imageUrl	string	HTTP/HTTPS URL or base64 data URL (data:image/...)
orderId	string	-
productId	string	-
status	string	-
trackingInfo		-

Payment Methods

Methods: tempo (from challenge)
Intents: charge (from challenge)
Currencies (discovery): -
Currency (challenge): USDC.e on Tempo (Tempo)
Multiple Challenges: No

Recipients

0xDb5AA553FeEB2c3E3D03e8360b36fb0f7e480671

Per-endpoint breakdown

POST /api/mug: 0xDb5AA553FeEB2c3E3D03e8360b36fb0f7e480671
POST /api/shirt: 0xDb5AA553FeEB2c3E3D03e8360b36fb0f7e480671

Security

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

Uptime

Discovery: Reachable (290ms)
Challenge: Reachable (478ms)
Last Checked: 2026-04-07T18:32:34Z

Schema Completeness

Paid Operations: 2
With Input Schema: 2
With Description: 2

Documentation

Homepage: -
API Reference: -
llms.txt: -

Discovery

OpenAPI URL: https://stablemerch.dev/openapi.json
OpenAPI Version: 3.1.0
Service Version: 1.0.0
Document Size: 9110 bytes
Document Hash: ca0c6d45602dadba366d7d2c6e351b9960130d73c54f3b1f52cd7a9c60455b70

Version History (2 snapshots)

Scan snapshots

Date	Grade	Score	Response	Status
2026-04-06	B	79%	304ms	Up
2026-04-07	B	79%	2542ms	Up