Developers

Swap one base URL

Relay speaks the OpenAI and Anthropic APIs verbatim. Point your existing SDK, coding agent, or curl script at the endpoint below and keep everything else.

Read the quickstart Jump to error codes

Quickstart

Base URL for OpenAI-compatible calls: https://ai-gateway.getborg.com/api/v1/proxy/v1. Model ids match the gateway catalog on /models/ — copy the exact id shown there for each model.

curl

curl https://ai-gateway.getborg.com/api/v1/proxy/v1/chat/completions \  -H "Authorization: Bearer $RELAY_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "model": "glm-5.3",    "messages": [{ "role": "user", "content": "Explain vector search in one paragraph." }]  }'

quickstart.py

from openai import OpenAI client = OpenAI(    base_url="https://ai-gateway.getborg.com/api/v1/proxy/v1",    api_key="$RELAY_API_KEY",) resp = client.chat.completions.create(    model="glm-5.3",    messages=[{"role": "user", "content": "Explain vector search in one paragraph."}],) print(resp.choices[0].message.content)

quickstart.ts

import OpenAI from "openai"; const client = new OpenAI({  baseURL: "https://ai-gateway.getborg.com/api/v1/proxy/v1",  apiKey: process.env.RELAY_API_KEY,}); const resp = await client.chat.completions.create({  model: "glm-5.3",  messages: [{ role: "user", content: "Explain vector search in one paragraph." }],}); console.log(resp.choices[0].message.content);

anthropic_quickstart.py

import anthropic client = anthropic.Anthropic(    base_url="https://ai-gateway.getborg.com/api/v1/proxy",    api_key="$RELAY_API_KEY",) msg = client.messages.create(    model="glm-5.3",    max_tokens=1024,    messages=[{"role": "user", "content": "Explain vector search in one paragraph."}],) print(msg.content)

Authentication

Every request authenticates with an API key created in the console using the standard Authorization: Bearer header.

auth

# Authenticate with a Bearer token. curl https://ai-gateway.getborg.com/api/v1/proxy/v1/chat/completions \  -H "Authorization: Bearer $RELAY_API_KEY" \  -H "Content-Type: application/json" \  -d '{ "model": "glm-5.3", "messages": [...] }'

Coding agents

Set these environment variables once and the agent routes every call through Relay — no config file changes.

Claude Code (.env)

export ANTHROPIC_BASE_URL="https://ai-gateway.getborg.com/api/v1/proxy"export ANTHROPIC_AUTH_TOKEN="$RELAY_API_KEY"export ANTHROPIC_MODEL="glm-5.3"

Codex (.env)

export OPENAI_BASE_URL="https://ai-gateway.getborg.com/api/v1/proxy/v1"export OPENAI_API_KEY="$RELAY_API_KEY"

Cursor (settings)

// Cursor > Settings > Models > OpenAI API Key// Base URL:https://ai-gateway.getborg.com/api/v1/proxy/v1// API Key:$RELAY_API_KEY

Images

Image generation is not available on Relay yet. We’ll publish the supported model, price, and quickstart at /images/when it is ready.

Errors

Two error codes matter in day-to-day use. Everything else follows the standard HTTP + JSON error body shape.

Code	Name	What it means
402	insufficient_balance	Your prepaid balance is at or below $0. Top up in the console — the request is rejected before it reaches any model provider, so you are never charged for it.
429	concurrency_limit	Your account has more than 8 in-flight requests across its API keys. Retry with backoff, or contact us to raise your account concurrency cap.