Discover / postalform.com

PostalForm Machine Payments API

■ Challenge detected

Machine-oriented print-and-mail endpoints for legacy x402 and MPP payment flows.

MPP
Tempo
USDC
web

Challenge detected: 3 of the last 10 checks
Median response: 208 ms
Last checked: 16 Oct, 18:49 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://postalform.com/api/machine/mpp/orders
# 402 Payment Required: pay with a MPP client, then send the request again.

3 listed endpoints · on mpp.dev

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://postalform.com/api/machine/mpp

POST/ordersNo price listedCreate and pay for a print-and-mail order Also on mppscan
POST/orders/validateNo price listedQuote and validate an order before payment
GET/orders/:idNo price listedPoll order status and fulfillment

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 3 of 3 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/postalform.com

Recent checks

28 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 10 checks

When (UTC)	Result	HTTP	Response
16 Oct, 18:49 UTC	Challenge detected	402	140ms
15 Oct, 14:11 UTC	Challenge detected	402	208ms
14 Oct, 08:45 UTC	Challenge detected	402	349ms
13 Oct, 20:45 UTC	No challenge detected	200	194ms
11 Oct, 19:34 UTC	No challenge detected	200	125ms
10 Oct, 03:32 UTC	No challenge detected	200	139ms
8 Oct, 21:32 UTC	No challenge detected	200	112ms
7 Oct, 15:42 UTC	No challenge detected	200	128ms
6 Oct, 15:31 UTC	No challenge detected	200	142ms
28 Sept, 17:02 UTC	No challenge detected	200	170ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 18:49 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What payment terms does PostalForm Machine Payments API advertise?

The listing advertises MPP, Tempo and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is PostalForm Machine Payments API listed?

In mpp.dev and mppscan. Superstables first indexed it on 26 Sept 2026.

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