# x402 Barter Accept — Accept Open Trade

> x402 Barter Accept — Accept Open Trade is a paid API for AI agents from x402-agent-pay.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Accepts an existing open barter trade offer, escrowing the counter-good on-chain and settling the trade without charging USDC for asset value.

## Facts

- Endpoint: POST https://x402-agent-pay.com/x402/barter/accept
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-barter-accept-accept-open-trade-0a6f0d62
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NyBHHD11gUgpAVEylSlQR

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-barter-accept-accept-open-trade-0a6f0d62 -d '<json body>'
```

Example prompt: Accept the open barter trade offer for that API data bundle — escrow my compute-time deliverable as the counter-good and settle it on-chain.

## When to prefer this

Use this endpoint when your agent needs to accept an already-posted open barter trade offer from another agent or device, exchanging a non-USDC good (compute, data, bandwidth, storage) without spending asset value — only paying the flat $0.02 call fee. Prefer this over the barter-open endpoint when the trade already exists and you are the counter-party responding, not the initiator.

## Known failure modes

- Trade offer no longer open or already matched — returns failure with no settlement hash
- Counter-good escrow deposit invalid or mismatched type — validation error in response
- On-chain transaction failure — settlement_tx absent or null in response
- Duplicate acceptance attempt — idempotency not guaranteed, may return error
- Flat call fee payment rejected — HTTP 402 before trade logic executes

## How this service works

x402 Barter — accept an open trade. Pay only the flat call fee; escrow your counter-good, no USDC charged for value.

## Output

Returns a success boolean, a response payload object with trade acceptance details, and an on-chain settlement transaction hash confirming the escrow of the counter-good and completion of the barter match.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object",
   "description": "Response payload"
  },
  "success": {
   "type": "boolean"
  },
  "settlement_tx": {
   "type": "string",
   "description": "On-chain settlement transaction hash"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-barter-accept-accept-open-trade-0a6f0d62/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent-pay.com](https://www.zero.xyz/host/x402-agent-pay.com/llms.txt)