LLM gateway
OpenAI-compatible pay-per-call inference over x402 - five quality tiers plus embeddings, image generation and text-to-speech, model-optional auto-routing, streaming, and a default-on prompt cache. See /v1 in the OpenAPI spec for the full wire format.
Chat completions - nano tier
POST /v1/nano/chat/completionsOpenAI-compatible chat completions, nano tier: gpt-4.1-nano, gpt-5-nano, gemini flash-lite, small llama/ministral/qwen, …
try in playground →Chat completions - auto tier (eval-ranked routing)
POST /v1/auto/chat/completionsOpenAI-compatible chat completions with server-side model choice: omit "model" (or send "auto") and the gateway routes t…
try in playground →Chat completions (OpenAI-compatible)
POST /v1/chat/completionsOpenAI-compatible chat completions over x402 - point any OpenAI SDK at base_url https://agent402.tools/v1 and pay per ca…
try in playground →Chat completions - pro tier
POST /v1/pro/chat/completionsOpenAI-compatible chat completions, pro tier: gpt-4o, gpt-4.1, claude sonnet, gemini pro, grok - paid per call in USDC o…
try in playground →Chat completions - premium tier
POST /v1/premium/chat/completionsOpenAI-compatible chat completions, premium tier: gpt-5, o3/o4, claude opus - paid per call in USDC over x402. Same wire…
try in playground →Embeddings (OpenAI-compatible)
POST /v1/embeddingsOpenAI-compatible text embeddings over x402 - point any OpenAI SDK at base_url https://agent402.tools/v1 and pay $0.002 …
try in playground →Image generation (OpenAI-compatible)
POST /v1/images/generationsOpenAI-compatible image generation over x402 - point any OpenAI SDK's images.generate() at base_url https://agent402.too…
try in playground →Text-to-speech (OpenAI-compatible)
POST /v1/audio/speechOpenAI-compatible text-to-speech over x402 - point any OpenAI SDK's audio.speech.create() at base_url https://agent402.t…
try in playground →