C

PostalForm Machine Payments API

https://postalform.com 72% (70/97)
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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
  • 402 response missing WWW-Authenticate header

Paid Operations (2)

POST /api/machine/orders dynamic
Create or reuse a legacy x402 machine order

Unauthenticated calls return 402 Payment Required when the order is ready to be paid. Retry the exact same body with PAYMENT-SIGNATURE after settlement.

Amount
dynamic
Currency
-
Method
x402
Intent
-
402 Declared
Yes
Non-standard x-payment-info fields: maxPrice: 200.00 minPrice: 3.40 pricingMode: range protocols: [x402]

Input Schema

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

Response Schema (200)

{
  "$ref": "#/components/schemas/MachineOrder"
}
POST /api/machine/mpp/orders dynamic
Create or reuse an MPP machine order

Unauthenticated calls return 402 Payment Required with WWW-Authenticate: Payment challenges. Retry the exact same body with Authorization: Payment after settlement.

Amount
dynamic
Currency
-
Method
mpp
Intent
-
402 Declared
Yes
Non-standard x-payment-info fields: maxPrice: 200.00 minPrice: 3.40 pricingMode: range protocols: [mpp]

Input Schema

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

Response Schema (200)

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

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 (441ms)
Challenge
Reachable (373ms)
Last Checked

Schema Completeness

Paid Operations
2
With Input Schema
2
With Description
2

Documentation

Homepage
-
API Reference
-
llms.txt
-

Discovery

OpenAPI URL
https://postalform.com/openapi.json
OpenAPI Version
3.1.0
Service Version
1.0.0
Document Size
21973 bytes
Document Hash
fe456703f064f42dcd6d396dd2da4bc84fb0268bd3e68092be2f771c33d76e9a

Version History (2 snapshots)

Scan snapshots
Date Grade Score Response Status
2026-04-06 C 72% 542ms Up
2026-04-07 C 72% 448ms Up