C
PostalForm Machine Payments API — MPP Grade C
Preview responses and set spending limits for this service through use.mpp.land
Free budget controls, response samples, and reliability routing.
On-chain Activity
23
Total txs
0
7d txs
$0.00
7d volume
$197.15
Total volume
12
Unique payers
0
Unique clients
7-day activity
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Compliance Checks
All paid ops declare 402 response
MUST
10pt
All x-payment-info valid
MUST
10pt
Challenge has Cache-Control: no-store
MUST
5pt
Challenge digest on POST
SHOULD
3pt
Challenge has expires
SHOULD
3pt
Challenge has Problem Details
SHOULD
2pt
Challenge has required params
MUST
5pt
Challenge has WWW-Authenticate
MUST
5pt
Challenge returns 402
MUST
10pt
Correct Content-Type
MUST
5pt
Has Cache-Control on discovery
SHOULD
5pt
Has input schemas
SHOULD
5pt
Has llms.txt
SHOULD
5pt
Has /openapi.json at root
MUST
10pt
Has required top-level fields
MUST
10pt
Served over HTTPS
MUST
10pt
Uses standard categories
SHOULD
2pt
2 issues
- OpenAPI doc exceeds 64KB limit (66802 bytes)
- 402 response missing WWW-Authenticate header
Paid Operations (4)
POST /api/machine/orders dynamic
Create or reuse an x402 machine order
Unauthenticated calls return 402 Payment Required when the order is ready to be paid. Retry the exact same body with PAYMENT-SIGNATURE after settlement.
- Amount
- dynamic
- Currency
- -
- Method
- x402
- Intent
- -
- 402 Declared
- Yes
Non-standard x-payment-info fields:
maxPrice: 200.00 minPrice: 3.40 pricingMode: range protocols: [x402]
Input Schema
{
"$ref": "#/components/schemas/MachineOrderRequest"
}Response Schema (200)
{
"$ref": "#/components/schemas/MachineOrder"
}POST /api/machine/flower-letters dynamic
Create or reuse an x402 flower-letter order
Unauthenticated calls return 402 Payment Required after PostalForm validates the Florist One product, delivery ZIP, delivery date, and final quote.
- Amount
- dynamic
- Currency
- -
- Method
- x402
- Intent
- -
- 402 Declared
- Yes
Non-standard x-payment-info fields:
maxPrice: 250.00 minPrice: 1.00 pricingMode: dynamic protocols: [x402]
Input Schema
{
"$ref": "#/components/schemas/MachineFlowerLetterRequest"
}Response Schema (200)
{
"$ref": "#/components/schemas/MachineFlowerLetterOrder"
}POST /api/machine/mpp/orders dynamic
Create or reuse an MPP machine order
Unauthenticated calls return 402 Payment Required with WWW-Authenticate: Payment challenges. Retry the exact same body with Authorization: Payment after settlement.
- Amount
- dynamic
- Currency
- -
- Method
- mpp
- Intent
- -
- 402 Declared
- Yes
Non-standard x-payment-info fields:
maxPrice: 200.00 minPrice: 3.40 pricingMode: range protocols: [mpp]
Input Schema
{
"$ref": "#/components/schemas/MachineOrderRequest"
}Response Schema (200)
{
"$ref": "#/components/schemas/MachineOrder"
}POST /api/machine/mpp/flower-letters dynamic
Create or reuse an MPP flower-letter order
Unauthenticated calls return 402 Payment Required with WWW-Authenticate: Payment challenges after Florist One validation and quote.
- Amount
- dynamic
- Currency
- -
- Method
- mpp
- Intent
- -
- 402 Declared
- Yes
Non-standard x-payment-info fields:
maxPrice: 250.00 minPrice: 1.00 pricingMode: dynamic protocols: [mpp]
Input Schema
{
"$ref": "#/components/schemas/MachineFlowerLetterRequest"
}Response Schema (200)
{
"$ref": "#/components/schemas/MachineFlowerLetterOrder"
}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 (529ms)
- Challenge
- Reachable (564ms)
- Last Checked
Schema Completeness
- Paid Operations
- 4
- With Input Schema
- 4
- With Description
- 4
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
- 66802 bytes
- Document Hash
- e6a2ce1cb4079c53a3288caa78df20ad2fd235f28721d7d0ef8593756c54cabc
Version History (52 snapshots)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
Grade: F (20%) → C (72%)
Grade: C (72%) → F (20%)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
Grade: F (13%) → C (72%)
Grade: C (72%) → F (13%)
Grade: F (20%) → C (72%)
Grade: C (72%) → F (20%)
- document hash changed (no semantic differences detected)
Grade: F (13%) → C (72%)
Grade: C (72%) → F (13%)
- document hash changed (no semantic differences detected)
- new endpoint: POST /api/machine/flower-letters
- new endpoint: POST /api/machine/mpp/flower-letters
Grade: F (20%) → C (72%)
Grade: C (72%) → F (20%)
Grade: F (13%) → C (72%)
Grade: C (72%) → F (13%)
Grade: F (13%) → C (72%)
Grade: C (72%) → F (13%)
Grade: F (20%) → C (72%)
Grade: C (72%) → F (20%)
Grade: F (13%) → C (72%)
Grade: C (72%) → F (13%)
- document hash changed (no semantic differences detected)
- document hash changed (no semantic differences detected)
Grade: F (20%) → C (72%)
Grade: C (72%) → F (20%)
- document hash changed (no semantic differences detected)
Scan snapshots
| Date | Grade | Score | Response | Status |
|---|---|---|---|---|
| 2026-04-06 | C | 72% | 542ms | Up |
| 2026-04-07 | C | 72% | 448ms | Up |
| 2026-04-08 | C | 72% | 415ms | Up |
| 2026-04-09 | C | 72% | 439ms | Up |
| 2026-04-10 | C | 72% | 416ms | Up |
| 2026-04-11 | C | 72% | 530ms | Up |
| 2026-04-12 | C | 72% | 438ms | Up |
| 2026-04-13 | C | 72% | 427ms | Up |
| 2026-04-14 | C | 72% | 434ms | Up |
| 2026-04-15 | C | 72% | 435ms | Up |
| 2026-04-16 | C | 72% | 466ms | Up |
| 2026-04-17 | C | 72% | 402ms | Up |
| 2026-04-18 | C | 72% | 421ms | Up |
| 2026-04-19 | C | 72% | 431ms | Up |
| 2026-04-20 | C | 72% | 407ms | Up |
| 2026-04-21 | C | 72% | 439ms | Up |
| 2026-04-22 | C | 72% | 466ms | Up |
| 2026-04-23 | C | 72% | 424ms | Up |
| 2026-04-24 | C | 72% | 436ms | Up |
| 2026-04-25 | C | 72% | 489ms | Up |
| 2026-04-26 | C | 72% | 417ms | Up |
| 2026-04-27 | C | 72% | 440ms | Up |
| 2026-04-28 | C | 72% | 436ms | Up |
| 2026-04-29 | C | 72% | 464ms | Up |
| 2026-04-30 | C | 72% | 408ms | Up |
| 2026-05-01 | C | 72% | 428ms | Up |
| 2026-05-02 | C | 72% | 429ms | Up |
| 2026-05-03 | C | 72% | 425ms | Up |
| 2026-05-04 | C | 72% | 429ms | Up |
| 2026-05-05 | C | 72% | 540ms | Up |
| 2026-05-06 | C | 72% | 515ms | Up |
| 2026-05-07 | C | 72% | 523ms | Up |
| 2026-05-08 | C | 72% | 503ms | Up |
| 2026-05-09 | C | 72% | 506ms | Up |
| 2026-05-10 | C | 72% | 511ms | Up |
| 2026-05-11 | C | 72% | 552ms | Up |
| 2026-05-12 | C | 72% | 509ms | Up |
| 2026-05-13 | C | 72% | 490ms | Up |
| 2026-05-14 | C | 72% | 598ms | Up |
| 2026-05-15 | C | 72% | 514ms | Up |
| 2026-05-16 | C | 72% | 527ms | Up |
| 2026-05-17 | C | 72% | 513ms | Up |
| 2026-05-18 | C | 72% | 511ms | Up |
| 2026-05-19 | C | 72% | 523ms | Up |
| 2026-05-20 | C | 72% | 521ms | Up |
| 2026-05-21 | C | 72% | 514ms | Up |
| 2026-05-22 | C | 72% | 516ms | Up |
| 2026-05-23 | C | 72% | 504ms | Up |
| 2026-05-24 | C | 72% | 524ms | Up |
| 2026-05-25 | C | 72% | 510ms | Up |
| 2026-05-26 | C | 72% | 555ms | Up |
| 2026-05-27 | C | 72% | 510ms | Up |