402 Index
The paid API directory for AI agents — indexed, verified, and searchable
Ecosystem Overview
109,288
Endpoints Indexed
36,446
Payment-Verified
3,765
Providers Indexed
2,307
Providers Verified
L402 Lightning Network
Verified165 / 1,373 (12%)
Providers22 / 85 (26%)
Healthy165
Decentralized, censorship-resistant, locally verifiable
x402 Base, Solana, etc.
Verified35729 / 106,483 (34%)
Providers2247 / 3611 (62%)
Healthy36051
Centralized facilitator required (4+ available), Base/Solana chains
MPP Stripe / Tempo
Verified552 / 1,432 (39%)
Verified (gateway-backed)123 / 374 (33%)
Providers61 / 116 (53%)
Healthy552
Stripe/Tempo facilitated, session-based settlement
Agent Discovery
Search the directory like an AI agent would through the MCP server
MCP Tool Call
{
"tool": "search_services",
"arguments": {}
}
Start typing or adjust filters to search...
Live Endpoint Health Check
Paste any API URL to run a real-time health check — see the protocol handshake live
Payment Flow
How an agent pays for an API call — step by step
1
Agent Sends Request
Agent discovers endpoint via 402index and sends request
GET https://parsebit-lnd.fly.dev/review/code
2
Server Returns 402
Server requires payment — returns 402 with payment instructions
WWW-Authenticate: L402 macaroon="AGIAJEem...", invoice="lnbc2000n1..."
3
Agent Pays Invoice
Agent pays Lightning invoice automatically via lnget or wallet
Lightning BOLT11 invoice Amount: 2000 sats Expiry: 60 seconds
4
Agent Retries with Token
Agent retries request with proof of payment
Authorization: L402 <macaroon>:<preimage>
5
Server Returns 200
Server validates payment and returns the requested data
HTTP/1.1 200 OK
Content-Type: application/json
{ "data": "..." }