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Build with Eon.

Bring Eon models into your own tools. API access requires an approved Enterprise organization and a key issued by Eon.

Private Enterprise pilot · invited testers only

Get access

Contact Eon Technologies to arrange an Enterprise pilot. Plus and Pro workspace subscriptions do not include API keys. Access is manually approved; Enterprise pricing and wider availability are arranged directly, with no self-service checkout.

Keep keys on your server. They are shown once, expire after 90 days and can be revoked by the operator. Never put a key in browser code or a public repository.

Make your first request

Set EON_API_KEY in your server environment, then send a text completion:

curl https://eon-lexis.vercel.app/api/v1/chat/completions   -H "Authorization: Bearer $EON_API_KEY"   -H "Content-Type: application/json"   -d '{"model":"lexis-2.1","messages":[{"role":"user","content":"Write a clear welcome message."}],"max_tokens":512}'

Read the answer at choices[0].message.content. The response includes usage and a request identifier. This endpoint generates text; it does not edit workspace files or run Codie tools.

EndpointPurpose
GET /api/v1/modelsList Enterprise model identifiers
POST /api/v1/chat/completionsOne bounded model response

Models: lexis-2.1 and sienta-2.1. Both endpoints require a Bearer key.

Predictable limits

  • Text messages only: 1–32 messages, up to 32,000 content characters. Large inputs may need to be shortened to fit the per-request provider budget.
  • max_tokens: 1–4,096; default 1,024. Optional temperature is 0–2 and thinking is a boolean. Output limits include reasoning when enabled.
  • Non-streaming JSON responses only in this pilot. Tool calls, attachments and automatic continuation are not exposed through this endpoint.
  • Organization limits cover monthly requests, tokens, request rate and a separate provider-cost ceiling. Active reservations count toward limits; unused portions are released at settlement. API allowances are separate from workspace Eon Tokens.
  • An optional UUID Idempotency-Key prevents duplicate model invocations. Reusing it returns 409 rather than generating or charging twice; it is not a response-retrieval endpoint.

401: invalid/expired key. 403: Enterprise approval or scope required. 409: request identifier already used. 413: request too large. 429: configured limit reached. 502/503: model or service unavailable. Keep the X-Request-Id / request_id when contacting support. Do not retry a submitted request under a new identifier unless you know it is safe to generate again.

Audit records contain identifiers, actions and usage—not prompt text, API secrets or response content. See the privacy notice.