Skip to main content

​
API Reference

The PolySimulator API is a REST + WebSocket surface. Every endpoint below is generated from a curated, stable OpenAPI spec (/openapi.json) and ships with an interactive playground — paste your ps_live_… key into the Authorization widget and you can fire requests against the live production environment from this browser tab.
The published reference is generated from a curated, stable OpenAPI spec. The live backend at api.polysimulator.com/openapi.json may expose additional unstable / legacy routes (v0 endpoints, internal helpers) that aren’t shown here — only the endpoints documented here are part of the supported public surface.
URL convention for endpoint pages: each endpoint has a dedicated page at /api-reference/{operationId} (camelCase) — e.g., POST /v1/orders lives at /api-reference/postOrder, GET /v1/markets/{condition_id} at /api-reference/getMarket. For convenience, natural API-path guesses (e.g. /api-reference/v1/orders, /api-reference/v1/markets/0xabc...) are auto-redirected to the canonical operationId page, so you can paste live API paths straight into the URL bar and land on the right reference.

Authentication

How X-API-Key, bootstrap, and the WebSocket JWT flow work.

Quick Start

From signup to first trade in under two minutes.

​
Endpoint groups

Use the sidebar to drill into any group. Each endpoint page shows the request schema, response schema, error codes, and a copy-pasteable curl / TypeScript / Python snippet.

​
Base URL

Most endpoints in this reference are mounted under /v1 — example: GET https://api.polysimulator.com/v1/account/balance. The one documented exception is /api/beta/cohort-status, a public read-only endpoint used by the pricing page to surface closed-beta slot availability.

​
Authentication at a glance

Most endpoints require an X-API-Key header. Public exceptions that work without a key: /v1/health, /v1/health/ready, /api/beta/cohort-status, and the public CLOB-read endpoints under CLOB Read (Public). Note /v1/keys/bootstrap is not public — it requires a Supabase Authorization: Bearer <access_token> JWT (returns 401 MISSING_AUTH without one), it just doesn’t take an X-API-Key because it mints your first key. Each endpoint’s individual page lists its own auth requirement at the top — check there if unsure. The Authentication guide covers key minting, rotation, revocation, and the short-lived WebSocket JWT flow.
The interactive playground on every endpoint page lets you store your key once and replay requests without retyping it. Keys you paste into the playground are stored locally in your browser and attached to playground requests as the X-API-Key header — they’re not transmitted anywhere until you click Send, at which point they’re sent to api.polysimulator.com in the request header like any other API client call.

​
Polymarket compatibility

PolySimulator is wire-compatible with py-clob-client and the Polymarket CLOB JSON shape for the endpoints under the CLOB Read (Public) and CLOB Compat groups. The CLOB compatibility guide lists every identical-vs-deviation contract item — read it before you port a bot. For the few documented deviations (the X-Polysim-Code machine header, the 402 UPGRADE_REQUIRED enrichment, paper-trading-only EIP-712 signing), the Polymarket Raw HTTP guide walks through each one with side-by-side request/response examples.

​
Rate limits + tiers

X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset are always present on rate-limited responses. X-RateLimit-Tier is present on authenticated responses only — unauthenticated requests metered against IP-only buckets omit it. The authoritative source for these numbers is GET /v1/keys/tiers. See Rate Limits for back-off strategy and the closed-beta cohort exception (admitted cohort keys run at their granted tier’s rate — admin beta-issued keys are enterprise-tier — then auto-downgrade to free + read-only at the key’s beta_until cutoff).

​
LLM-targeted reference

If you’re driving this API from an AI coding assistant, point it at /llms.txt — a single ~50 KB markdown blob with every endpoint, schema, and Polymarket parity note in a model-friendly format. Cursor / Claude Code / Continue / Windsurf can also ingest the docs via the hosted MCP server or Context7.