Multiple models.
One endpoint.

Make your first base/mnt.ai request in under a minute. The router speaks both the OpenAI and Anthropic wire formats, so any existing SDK, CLI, or coding agent works with a one-line change.

1. Get an API key

1. Sign in at basemnt.ai.
2. Open Settings → API keys and create a key.

Keys look like sk-.... Treat them like passwords — requests are metered per plan, and a leaked key burns your quota.

2. Point a client at the router

The base URL is https://api.basemnt.ai. Both protocol families live on the same host:

curl https://api.basemnt.ai/v1/chat/completions \
  -H "Authorization: Bearer $SK_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-v4-flash-0731",
    "messages": [{ "role": "user", "content": "Hello, basement." }]
  }'

3. Pick a model

List everything your key can reach:

curl https://api.basemnt.ai/v1/models \
  -H "Authorization: Bearer $SK_KEY"

See Models for the current catalog. Model IDs are the routing key — pass them verbatim in the model field.

4. Stream it

Add "stream": true to stream Server-Sent Events as tokens arrive:

curl https://api.basemnt.ai/v1/chat/completions \
  -H "Authorization: Bearer $SK_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-v4-flash-0731",
    "messages": [{ "role": "user", "content": "Hello" }],
    "stream": true
  }'

Next steps

• API Reference — every endpoint, parameter, and error code.
• Connect coding agents — Claude Code, Codex, OpenCode, Pi, omp, and more, via one env var.