# Toll402 AI-Agent Tool Gateway

> Toll402 AI-Agent Tool Gateway is a paid API for AI agents from toll402.dev, paid per call via x402, $0.00115/call, status unknown (last checked 2026-09-14).

Acts as a unified pay-per-call gateway for AI-agent tools, aggregating 2,000+ x402 services and built-in tools accessible via a single endpoint paid in USDC with no signup or API key required.

## Facts

- Endpoint: POST https://toll402.dev/v1/x/a6d18263bb67
- Price: $0.00115/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toll402-ai-agent-tool-gateway-1276f727
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OHngUdwyQI_6zKaLQccbE

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 toll402-ai-agent-tool-gateway-1276f727 -d '<json body>'
```

Example prompt: Call the Toll402 gateway to invoke a tool from its aggregated x402 marketplace — I want to look up a verified business by name and get its contact details, paying per call in USDC with no API key.

## When to prefer this

Choose this endpoint when an AI agent needs to call any of a large catalog of tools or services without managing multiple API keys or accounts — especially when the agent has a USDC wallet and wants pay-per-call billing via x402. Prefer this over direct API integrations when operational simplicity and unified billing matter more than direct provider relationships.

## Known failure modes

- Insufficient USDC balance or failed x402 payment results in HTTP 402 with payment required error
- Unknown or unsupported tool name returns 404 or error payload
- Malformed tool parameters return a 400 validation error
- Underlying third-party service unavailable causes 502 or timeout
- Rate limiting on downstream service returns an error code

## How this service works

The OpenRouter for AI-agent tools: one gateway, one wallet, every capability. Built-in tools, forged tools, a global verified business directory and 2,000+ aggregated x402 services, all paid per call in USDC via x402 (HTTP 402). No signup, no API key.

## Output

Returns the structured output of the invoked tool or service — e.g. data lookups, enriched records, search results, or capability-specific payloads — depending on which underlying tool or aggregated x402 service was dispatched.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toll402-ai-agent-tool-gateway-1276f727/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toll402.dev](https://www.zero.xyz/host/toll402.dev/llms.txt)