npm install @xactum/client

import { XactumClient } from "@xactum/client";

const xactum = new XactumClient({
  payerPrivateKey: process.env.XACTUM_PAYER_PRIVATE_KEY as `0x${string}`,
    acceptTerms: true, // you accept https://api.xactum.com/terms as a business
      businessUse: true,
      });

      const a = await xactum.verifyPrice({ modelId: "anthropic/claude-sonnet-5.5", inputPerMTok: 3, outputPerMTok: 15 });
      console.log(a.result.verdict); // COMPETITIVE | FLAG_HIGH | FLAG_LOW | ... | INCONCLUSIVE
      ```

      ## Use it as an MCP server (Claude, Cursor, any MCP client)

      ```json
      {
        "mcpServers": {
            "xactum": {
                  "command": "npx",
                        "args": ["-y", "@xactum/client"],
                              "env": {
                                      "XACTUM_PAYER_PRIVATE_KEY": "0x…",
                                              "XACTUM_ACCEPT_TERMS": "true",
                                                      "XACTUM_BUSINESS_USE": "true"
                                                            }
                                                                }
                                                                  }
                                                                  }
                                                                  ```

                                                                  Tools: `xactum_verify_price`, `xactum_verify_model`, `xactum_feedback`.

                                                                  ## Rules we hold ourselves to

                                                                  1. Oracle, never proxy: XACTUM never forwards, resells or touches your model calls.
                                                                  2. Zero referral fees: revenue comes only from the per-query fee paid by the agent.
                                                                  3. Verdicts are advisory. Business use only. See the [terms](https://api.xactum.com/terms).

                                                                  MIT licensed. Contact: xactumoracle@proton.me