Json Schema Validator 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

Agent402.Tools: pay-per-call web tools

by MikeyPetrillo

A

Agentic Finance: 500+ agent tools, multi-chain USDC over x402 or MPP, free via PoW or card credits

3

PipRail

by piprail

B

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

4

POPCORN MCP

by violetclaire

B

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

5

X402 Data Gateway

by epistemedeus

B

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

Pay-per-call MCP tools (crypto/DeFi data, web reading, AI tasks) in USDC over x402 on Base.

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

8

gate402 merchant checkout

by ogenalabs.com

A

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

9

Anyway Possible Paid Agent Utilities

by anyway-possible

A

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

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

Pay-per-call LLM chat plus data tools: DNS, crypto, Base gas, Wikipedia. x402 USDC or Lightning.

12

send21

by send21io

B

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

13

Blockrun

by BlockRunAI

B

Web search, deep research, prediction markets & crypto data for AI agents. Pay per call via x402.

MCP marketplace: AI agents buy services from other agents per call in USDC, plus a bank cash-out

15

Churnkey

by churnkey.co

A

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

16

K-Data — Korean Sell-Side Research & Market Data

by juh5ng

A

Korean equity research, analyst revisions, kimchi premium and news via x402.

17

Easypaydirect

by praveendias1180

B

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

18

payware

by payware

B

payware A2A payments API for merchants, ISVs and payment institutions

19

AgentServices

by agentservices.to

A

52 paid x402 API endpoints for AI agents — crypto, data, DeFi, market intelligence.

20

AurasPay Merchant MCP

by auraspay.com

A

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

21

Losbeto

by rmartins1451

A

x402-paid market intelligence: forex, stocks, Brazil macro (BCB/B3) + crypto.

22

AgentData — crypto market data with a checkable record

by speteai

A

Verifiable crypto signals, recorded history and always-on monitoring for AI agents via x402 on Base.

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

24

Nota

by PugarHuda

A

Read-only crypto research skills that check a price, RSI and ATR against independent sources.