DEVELOPER PLATFORM

Build once.
Keep moving.

Newton’s gives the tools around your models one clear access layer: a catalog you can inspect, routes you can name, and receipts you can act on when a provider limit lands in the middle of valuable work.

Start with the API →Explore models

CHOOSE YOUR PATH

Everything you need
to get unstuck.

Start at the surface that matches the work you are doing. The underlying contract stays the same: published models, explicit routing, and no silent provider substitution.

01API reference

Make the first request.

Use a focused OpenAI-compatible surface with exact published model IDs, streaming, and a settled Newton’s receipt on every accepted call.

Read the reference

02Coding agents

Give your agent a safe job.

Onboard Codex, Claude Code, Cursor, or another repo-aware agent without putting a secret in chat, source code, logs, or commits.

Copy the setup prompt

03Model discovery

Select what you mean.

Browse the flagship shelf by provider and capability, then carry the selected model intent into setup instead of guessing an ID.

Browse models

04Integrations

Keep your workflow.

Connect the SDK, editor, script, or automation environment already in front of you. Newton’s is the access layer underneath it.

See integrations

FIELD GUIDE

Learn the system
as you use it.

Short, practical guides for the moments where access, routing, or recovery matters more than another abstraction.

01QUICKSTARTFrom zero to a verified completionThe shortest path from an environment variable to a response whose requested and resolved model are visible.02ROUTINGRead a receipt like an operatorUnderstand exact routes, explicit fallbacks, billing lanes, and the headers that make a request accountable.03OPERATIONSRetry without making things worseUse status, Retry-After, bounded backoff, and request IDs to recover from interruptions safely.04TRUSTKnow where your request goesReview key handling, processing disclosures, supported content, and the conditions that make a route fail closed.

SURFACEOpenAI-compatible

Use the client you already know. Change the base URL; keep your application shape.

CATALOGExact by design

Choose an ID returned by the live catalog. Unsupported or mismatched routes fail closed.

ACCOUNTINGReceipt included

See request ID, resolved model, billing mode, and policy status without guessing what happened.

READY WHEN YOU ARE

Make your next request
the last setup you need.

Start building →Check status