An Anthropic Messages API compatible endpoint for uncensored models

What are the base URL, endpoint and headers?

• Base URL for Anthropic SDKs: https://inference.dagon.so. The SDK adds /v1/messages.
• Endpoints: POST https://inference.dagon.so/v1/messages, and POST https://inference.dagon.so/v1/messages/count_tokens to count tokens for free.
• Key: x-api-key: gk_..., as the Anthropic SDKs send it; Authorization: Bearer gk_... works too, and wins if both are sent.
• anthropic-version is forwarded as you send it.
• Errors on this endpoint use the Anthropic error shape.

The official Anthropic SDKs also read ANTHROPIC_BASE_URL and ANTHROPIC_API_KEY from the environment, so code that builds its client without arguments switches by setting those two variables and the model id.

Python (anthropic)

# pip install anthropic
import os
import anthropic

client = anthropic.Anthropic(base_url="https://inference.dagon.so", api_key=os.environ["DAGON_KEY"])
msg = client.messages.create(
    model="glm-5.3-abliterated",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print("".join(block.text for block in msg.content if block.type == "text"))

TypeScript (@anthropic-ai/sdk)

// npm install @anthropic-ai/sdk
import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({ baseURL: "https://inference.dagon.so", apiKey: process.env.DAGON_KEY });
const msg = await client.messages.create({
  model: "glm-5.3-abliterated",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Explain this stack trace." }],
});
console.log(msg.content.filter((b) => b.type === "text").map((b) => b.text).join(""));

curl

curl https://inference.dagon.so/v1/messages \
  -H "x-api-key: $DAGON_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model": "glm-5.3-abliterated", "max_tokens": 1024, "messages": [{"role": "user", "content": "Hello"}]}'

Add "stream": true for server-sent events in the Messages event format.

Which models answer on /v1/messages?

A Messages request goes only to the providers that serve its model on Messages, so the providers and the price can differ from the model's cheapest route on Chat Completions. The abliterated models are marked removed; models marked standard or reduced keep some or most of their refusals.

Prices are per 1M tokens in USD at the cheapest provider serving each model on Messages, with the 10% markup included, at price version 2026-11-11.4. A request that falls back to another provider is billed at that provider's rate plus the markup; its receipt names the provider. Live: /v1/models (each offer lists its endpoints).

What does the endpoint support, and what does it refuse?

• Fields: model, messages, max_tokens, system, stop_sequences, stream, temperature, top_p, top_k, tools, tool_choice, thinking and metadata. max_tokens is required; any other non-null field is 400 unsupported_parameter.
• Client tools, with tool_choice auto, any, none or a named tool. Server tools (web search, web fetch, code execution, MCP) are refused.
• Images as image blocks with a base64 source, on models that take image input.
• No anthropic-beta value is accepted: a request with one is 400 unsupported_parameter, so a client that requires a beta does not work.
• Token counting is free and served by abliteration.ai, so it works for the models abliteration.ai serves on Messages.

Full reference: Anthropic Messages docs.

How do you get a key and pay?

Create a key with curl -X POST https://inference.dagon.so/v1/keys (no email or password) or in the console, and fund it with USDC from $5. An agent can also pay per request with x402 on /v1/messages, without a key. Every model's price is on the pricing page.

We do not monitor or log your content, and the acceptable use policy applies: use it lawfully and only against systems and people you own or have permission to test. We suspend keys that break it.

Common questions