Part D Cap alternatives

1

X402 List

by x402-list.com

A

Find and vet x402 payment APIs before your agent pays one: uptime, price, on-chain volume.

2

Trading Signals

by roman-rr

B

Live AI crypto trading signals for agents. No API key needed to try — 3 signals + hit rate.

3

PipRail

by piprail

B

Budget-bound x402 payment wallet for AI agents — pays HTTP 402 URLs, capped locally. No backend.

4

Churnkey

by churnkey.co

A

Read and manage Churnkey cancel flows, retention metrics, and payment recovery

5

POPCORN MCP

by violetclaire

B

Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.

6

Easypaydirect

by praveendias1180

B

Read-only MCP server for the Easy Pay Direct (EPD) / NMI-family payment gateway Query API.

7

payware

by payware

B

payware A2A payments API for merchants, ISVs and payment institutions

8

X402 Data Gateway

by epistemedeus

B

Paid x402 and MPP tools for agent discovery, payment safety, data, and DeFi.

Lint an HTTP endpoint's x402 402 conformance; decode X-PAYMENT blobs; inspect a facilitator.

10

AurasPay Merchant MCP

by auraspay.com

A

Review AurasPay merchant payments and prepare payment links with scoped OAuth and human approval.

11

gate402 merchant checkout

by ogenalabs.com

A

Drop-in x402 checkout for merchants: issue terms, verify payment. $0.01 each.

Israeli invoice payment gate with PAY/HOLD/BLOCK decisions and public company-registry evidence.

13

Anyway Possible Paid Agent Utilities

by anyway-possible

A

Paid x402 tools for merchant intelligence, Base payment readiness, and verifiable web evidence.

14

Barcode Qr Code Sepa Payment Ean13

by theluckystrike

A

QR codes and barcodes offline: WiFi, vCards, SEPA payment codes, Code 128, EAN-13, SVG or PNG.

15

Amortization

by theluckystrike

A

Loan and lease schedules: payment, interest, early settlement and the journal, to the minor unit.

Authorize x402 payments before signing with request-bound, signed safety decisions.

17

OpenBoss

by flisko

B

Public internet HP bar. Agents smack it over MCP. They cannot complete payment.

18

EcoAloha

by ArneFfm

B

Search and compare outdoor experiences. Public keyless API; booking and payment happen on Viator.

19

send21

by send21io

B

Non-custodial payment drafts/pay links for BTC, USDC, USDT, EURC. Never holds keys.