{ "openapi": "3.1.0", "info": { "title": "API Price Index — open data API", "version": "1", "summary": "Live, verified LLM API prices as static JSON/CSV endpoints.", "description": "Read-only data endpoints of apipriceindex.com. 539 tracked endpoints as of 2026-09-05T14:11:24Z. Every price carries its verification date and official source URL. Files are regenerated from the index on every rebuild — same data as the human pages, never a diverging export. No auth, no rate key: plain HTTPS GET.", "license": { "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/" }, "contact": { "name": "API Price Index", "url": "https://apipriceindex.com/use-this-data/", "email": "contact@apipriceindex.com" }, "x-attribution": "API Price Index (https://apipriceindex.com) — CC BY 4.0, attribution required", "x-as-of": "2026-09-05T14:11:24Z" }, "servers": [ { "url": "https://apipriceindex.com" } ], "paths": { "/api/all.json": { "get": { "operationId": "getAllModels", "summary": "Full dataset: every tracked endpoint with price, specs and freshness", "description": "Stability contract: within a schema_version, existing fields never change name or type; fields may be ADDED. Any removal/rename bumps schema_version.", "responses": { "200": { "description": "The full index", "content": { "application/json": { "schema": { "type": "object", "properties": { "schema_version": { "type": "integer" }, "name": { "type": "string" }, "description": { "type": "string" }, "license": { "type": "string" }, "license_url": { "type": "string", "format": "uri" }, "attribution": { "type": "string" }, "docs": { "type": "string", "format": "uri" }, "as_of": { "type": [ "string", "null" ], "format": "date" }, "count": { "type": "integer" }, "models": { "type": "array", "items": { "type": "object", "properties": { "id": { "type": "string", "description": "Stable endpoint id (provider:model)" }, "name": { "type": "string" }, "provider": { "type": "object", "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "url": { "type": "string", "format": "uri" } } }, "base_model": { "type": [ "string", "null" ], "description": "Underlying model when the endpoint is a hosted open model" }, "category": { "type": "string" }, "context_window": { "type": [ "integer", "null" ], "description": "Tokens" }, "max_output": { "type": [ "integer", "null" ], "description": "Tokens" }, "release_date": { "type": [ "string", "null" ], "format": "date" }, "license": { "type": [ "string", "null" ] }, "open_weights": { "type": [ "boolean", "null" ] }, "pricing": { "type": [ "object", "null" ], "description": "Verified price. null when the endpoint is tracked but not priced.", "properties": { "input_per_mtok": { "type": "number", "description": "USD per 1M input tokens" }, "output_per_mtok": { "type": "number", "description": "USD per 1M output tokens" }, "cached_input_per_mtok": { "type": [ "number", "null" ], "description": "USD per 1M cached input tokens; null when the provider publishes no cached price" }, "currency": { "type": "string", "const": "USD" }, "confidence": { "type": [ "string", "null" ], "description": "Cross-check confidence of the price" }, "verified_at": { "type": [ "string", "null" ], "format": "date", "description": "Date the price was last verified against its source" }, "source_url": { "type": [ "string", "null" ], "format": "uri", "description": "Official pricing page the price was read from" } } }, "no_credit_card": { "type": "boolean" }, "page": { "type": "string", "format": "uri", "description": "Per-model JSON page for this endpoint" } } } } } } } } } } } }, "/api/pricing-history.csv": { "get": { "operationId": "getPricingHistory", "summary": "Price history CSV: one row per (endpoint, date), a point only when the price actually changed", "description": "Columns: id,provider,model,date,input_usd_per_mtok,output_usd_per_mtok. New columns may be appended at the END of the line only. X-As-Of response header carries the index date.", "responses": { "200": { "description": "CSV, header row first", "content": { "text/csv": { "schema": { "type": "string" } } } } } } }, "/api/{provider}/{model}.json": { "get": { "operationId": "getModel", "summary": "Full record of one endpoint: pricing with source, price history, specs, latency, license", "parameters": [ { "name": "provider", "in": "path", "required": true, "schema": { "type": "string" }, "description": "Provider slug, e.g. anthropic" }, { "name": "model", "in": "path", "required": true, "schema": { "type": "string" }, "description": "Model slug, e.g. claude-sonnet-5" } ], "responses": { "200": { "description": "One endpoint record; _meta carries attribution and license", "content": { "application/json": { "schema": { "type": "object" } } } }, "404": { "description": "Endpoint not tracked (static file absent)" } } } }, "/api/badge/{provider}/{model}.json": { "get": { "operationId": "getBadge", "summary": "shields.io endpoint-badge JSON with the live price of one endpoint", "description": "Render via https://img.shields.io/endpoint?url=. Green = price verified <7 days, orange = older.", "parameters": [ { "name": "provider", "in": "path", "required": true, "schema": { "type": "string" } }, { "name": "model", "in": "path", "required": true, "schema": { "type": "string" } } ], "responses": { "200": { "description": "shields.io schemaVersion 1 payload", "content": { "application/json": { "schema": { "type": "object" } } } }, "404": { "description": "Endpoint not tracked or not priced" } } } }, "/health.json": { "get": { "operationId": "getHealth", "summary": "Pipeline health: freshness of each data job, so consumers can detect a stale index", "responses": { "200": { "description": "Per-job freshness status", "content": { "application/json": { "schema": { "type": "object" } } } } } } } } }