# Northline Agent Services Sample

> Northline Agent Services Sample is a paid API for AI agents from 206-81-14-131.sslip.io, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-02).

A sample pay-per-call agent service endpoint on the Northline platform, payable via x402 protocol using USDC on Base with no account or API key required.

## Facts

- Endpoint: POST https://206-81-14-131.sslip.io/svc/agent-services/sample?utm_source=zero.xyz
- Price: $0.0025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/northline-agent-services-sample-80d7516f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VaxiJFEgaJ1_55MK1PK-c

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 northline-agent-services-sample-80d7516f -d '<json body>'
```

Example prompt: Call the Northline sample agent service endpoint and pay the $0.0025 USDC fee via x402 on Base — I want to see what the response looks like without setting up any API keys or accounts.

## When to prefer this

Use this endpoint when you want to test or prototype with x402 pay-per-call micropayment APIs on Base without setting up API keys or user accounts. Ideal for agents evaluating the Northline platform or developers building x402-compatible payment flows who want a minimal working example.

## Known failure modes

- Insufficient USDC balance causing payment failure and 402 response
- Invalid x402 payment header format rejected by server
- Network timeout contacting 206-81-14-131.sslip.io
- Payment processed but service temporarily unavailable (500 error)
- Unsupported chain or token used for payment

## How this service works

Pay-per-call APIs, paid downloads and work-on-request for agents. Payment: x402 (USDC on Base, eip155:8453), no accounts or API keys. Catalog: https://206-81-14-131.sslip.io/?format=json. Agent guide: https://206-81-14-131.sslip.io/llms.txt

## Output

A response from the Northline sample agent service endpoint, demonstrating the output structure of a pay-per-call x402-gated API response after the $0.0025 USDC payment is processed on Base.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/northline-agent-services-sample-80d7516f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 206-81-14-131.sslip.io](https://www.zero.xyz/host/206-81-14-131.sslip.io/llms.txt)