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AgentIndex x402 Tip Endpoint
x402
AgentIndex x402 Tip Endpoint is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Accepts a micropayment tip via x402/USDC on Base and echoes back a payment receipt with payer, network, and request metadata.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call tools for AI agents: web search + content, documents, live market data, and multi-chain wallet/gas reads. Mainnet test from $0.000001 USDC on Base. Pay-per-call tools for AI agents in USDC on Base (x402/MPP): search, pdf, web-read, extract, summarize, fact-check, translate, jobs, discover. See GET /capabilities.
Output
Returns a JSON object with ok (boolean), payer wallet address, network (eip155:8453 for Base), purpose string, price in USDC and atomic units, an x402 receipt object, and an echo of any message or request fields sent.
Example use cases
Test x402 payment flow
“Send a tiny $0.01 USDC test payment to AgentIndex via x402 on Base mainnet and echo the message 'payment test OK' so I can see the receipt and confirm my wallet is set up correctly.”
Verify payer wallet receipt
“Make a $0.01 x402 tip to AgentIndex on Base and show me the receipt — I need to confirm which wallet address was charged and that the network is eip155:8453.”
Tip AgentIndex after tool use
“Send a $0.01 USDC tip to AgentIndex on Base as a thank-you for the web search results I just got — use x402 and confirm the payment settled.”
Technical details
Endpoint
GEThttps://x402.agentindex.world/tip?utm_source=zero.xyzWhen to prefer
Use this endpoint to test or demonstrate x402 micropayment settlement on Base mainnet, confirm wallet and payment infrastructure is working, or send a small tip to AgentIndex. It is the simplest x402 endpoint available — not for data retrieval or AI tool calls.
Side effects
- Payment not settled: returns 402 if x402 payment header is missing or insufficient
- Invalid method: only GET, HEAD, DELETE are accepted
- Insufficient USDC balance: payment fails at the facilitator level
- Network mismatch: payment on wrong chain results in rejection
- Malformed query params: unexpected fields rejected due to strict schema
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"payer": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
"network": "eip155:8453",
"purpose": "support-agentindex",
"request": {
"echo": {
"hello": "agent"
},
"method": "POST"
},
"price_usdc": 0.01,
"price_atomic_usdc": "10000"
}
}Tags
x402
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Zero review prompt (fires after every successful call)
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