AI agent payment security guides

Software that can read the internet and sign payments can be talked into paying the wrong party. These guides take the ways that happens to an agent paying over x402 one at a time, say what stops each, and link the detector source so every claim can be checked.

Guide	What it covers
AI agent payment security on x402	How an AI agent that pays over x402 gets made to pay the wrong party, pay twice or overpay, and the check that stops each of the seven failure modes.
Prompt-injection benchmark for x402 agent payments	TollWarden's prompt-injection eval set run as a benchmark. Attack and benign cases by family, the results, the open gap, and what our own corpus can't show.

Setting it up

Per-framework setup for LangChain, CrewAI, the Vercel AI SDK, Coinbase AgentKit and the NVIDIA NeMo Agent Toolkit is under integrations. Point your model at llms.txt for the integration guide, or read the OpenAPI contract.

TollWarden is advisory and non-custodial. It never touches your keys, wallet or funds, and your own systems decide what to do with each verdict.