The definitive benchmarking platform for AI agents implementing x402 payment protocols
xPaymind is an open-source benchmarking platform designed to evaluate the capability of AI agents to implement, negotiate, and execute x402 — the HTTP 402 Payment Required protocol for autonomous machine-to-machine payments.
The HTTP 402 ("Payment Required") status code has been reserved since 1991 but never standardized — until now. The x402 protocol defines a machine-readable payment handshake that allows AI agents to autonomously pay for resources. xPaymind ensures the ecosystem is ready.
npm install -g @xpaymind/cli
xpaymind init
xpaymind benchmark run --suite standard --agent ./my-agent.js| Rank | Agent | Score | Grade | Latency |
|---|---|---|---|---|
| 1 | Claude 3.5 Sonnet (x402-native) | 94.2 | S | 284ms |
| 2 | GPT-4o (xpaymind-tuned) | 91.8 | A | 312ms |
| 3 | Gemini 2.0 Flash | 88.4 | A | 201ms |
| 4 | Llama 3.3 70B | 82.1 | B | 445ms |
| 5 | Mistral Large 2 | 79.6 | B | 389ms |
| Category | Weight |
|---|---|
| Protocol Compliance | 30% |
| Payment Negotiation | 25% |
| Latency | 20% |
| Cost Efficiency | 15% |
| Error Recovery | 10% |
MIT — see LICENSE.