Agent payments infrastructure

Where AI agents pay for APIs and sellers earn per call

Search and discover paid APIs through OpenDexter. Settle payments instantly through the Facilitator. Get intelligent next-step recommendations through Instinct. All via MCP, all in USDC, all on-chain.

  • Automatic refunds on failed calls
  • Most permissive facilitator — highest limits, lowest cost, sponsored gas
  • On-chain reputation — know who you're paying
Connect your agentList your APIDocs
Settlement live across supported chains
SolanaBasePolygonAvalancheArbitrumOptimismSKALE
Scroll to explore

How it works

AI AgentSends a request to a paid API endpoint
402 ResponseEndpoint returns Payment Required + price in USDC
Dexter FacilitatorVerifies payment, settles on-chain, returns signed receipt
Payment VerifiedAgent retries with payment proof attached
Your APIDelivers data + Instinct recommendation for the next tool

Every transaction settled on-chain in USDC in under 400ms. No subscriptions. No API keys. No human in the process. Pay only for what your agent uses. Instinct tells it what to use next.

Instinct

Your agent already knows what to call next

Dexter sees every x402 settlement on the network. It learns which APIs get called together, by what kind of agent, in what order. After every call, your agent gets a recommendation for the next one — no searching required.

For agent builders

Your agent stops searching after every action. The next tool is already surfaced in the settlement response. Fewer steps, faster workflows.

For API sellers

Your API gets recommended to the agents most likely to need it. Pay per impression. Every match is tied to an on-chain settlement — verifiable proof, not vanity metrics.

settlement response
{
  "status": "settled",
  "txHash": "5Kx9...mW7d",
  "amount": 0.02,
  "resource": "jupiter/v6/quote",
instinct recommendation
  "resourceUrl": "solscan.io/v1/trending",
  "description": "Trending tokens — real-time",
  "cost": 0.01
}

Built on the open sponsored-access x402 extension. Any facilitator can adopt it.

OpenDexter

Search, discover, and pay

6 MCP tools. No auth required. Bring your own wallet.

npm
npx opendexter install
or
MCP URL
open.dexter.cash/mcp

x402_search

Find paid APIs by keyword, category, or chain

x402_fetch

Call any x402 endpoint with automatic payment

x402_pay

Explicit payment verb — alias for fetch

x402_check

Preview pricing without paying

x402_access

Identity-gated auth via wallet signature

x402_wallet

Create wallet, check balances, fund

Works in Claude, ChatGPT, Cursor, or any MCP client.

Browse APIsConnect your agent

Facilitator

Free settlement. Every chain.

The Dexter Facilitator sits between AI agents and API tools. It verifies payments, signs settlements, and sponsors gas fees. The seller gets paid. The buyer gets the data.

$0Gas fees — sponsored by Dexter
<400msSettlement confirmation
Signed receiptreturned with every settlement
SolanaBasePolygonArbitrumOptimismAvalancheSKALE

For buyers

Verified payment + receipt. Predictable outcomes for pay-per-call.

For sellers

Get paid without building billing, invoicing, or settlement logic.

Automatic RefundsBad response? Money back. Every paid request is monitored — if you didn't get what you paid for, your USDC comes back on-chain. Automatically.
Explore the FacilitatorDocs

Settlement. Discovery. Instinct. Open and integrated.

Start building with pay-per-call payments, MCP marketplace, and on-chain settlement — or list your API and start earning today.

Connect your agentList your API