# Toll402 Pay-Per-Call AI Agent Tool Gateway

> Toll402 Pay-Per-Call 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 2026-10-11).

Aggregates 2,000+ x402-compatible AI agent tools and services into a single pay-per-call gateway, billed in USDC on Base via HTTP 402, with no signup or API key required.

## Facts

- Endpoint: POST https://toll402.dev/v1/x/fa76689ac8ca?utm_source=zero.xyz
- Price: $0.00115/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toll402-pay-per-call-ai-agent-tool-gateway-5fbd784c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EaPlsC5flspOgLxQsLg9Y

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-pay-per-call-ai-agent-tool-gateway-5fbd784c -d '<json body>'
```

Example prompt: Use Toll402 to call one of its aggregated AI tools — pay per call in USDC on Base with no API key — and run a web search for the latest news on agentic AI frameworks.

## When to prefer this

Choose Toll402 when your AI agent needs to call many different tools or services without managing individual API keys or subscriptions. It is ideal for autonomous agents operating with a crypto wallet on Base that need flexible, pay-as-you-go access to a broad ecosystem of capabilities. Prefer this over individual service APIs when minimizing onboarding friction and centralizing payment logic matters more than direct vendor relationships.

## Known failure modes

- Insufficient USDC balance in wallet — payment rejected with HTTP 402
- Invalid or unrecognized tool identifier — endpoint not found
- Downstream service unavailable — gateway returns error from upstream
- Malformed tool parameters — validation error returned
- Network congestion on Base chain — payment confirmation delayed

## 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 response from the downstream tool or service invoked through the gateway, along with payment confirmation. The exact shape of the result depends on which tool was called, but the gateway normalizes access and handles x402 payment negotiation transparently.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toll402-pay-per-call-ai-agent-tool-gateway-5fbd784c/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)