Claude + VeracityAPI: MCP for clients, SDK for custom agents.

Anthropic SDK direct integration (tool_use pattern)

// Anthropic SDK direct integration: VeracityAPI as a Claude tool.
// Pattern: tool_use in messages.create with a structured definition.
import Anthropic from "@anthropic-ai/sdk";
const client = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });

const veracityTool = {
  name: "verify_content",
  description: "Verify text or image URL for workflow-risk routing. Returns recommended_action: allow, revise, human_review, or reject.",
  input_schema: {
    type: "object",
    properties: {
      type: { type: "string", enum: ["text", "image"] },
      content: { type: "string", description: "Text body OR public HTTPS image URL" },
      intended_use: { type: "string", enum: ["publish", "cite", "train", "moderate", "other"] },
      domain: { type: "string", description: "Free-form context, e.g. 'travel safety editorial'" },
    },
    required: ["type", "content", "intended_use"],
  },
};

async function callVeracity(input: { type: string; content: string; intended_use: string; domain?: string }) {
  const r = await fetch("https://api.veracityapi.com/v1/analyze", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${process.env.VERACITY_API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      type: input.type,
      content: input.content,
      context: { format: "article", intended_use: input.intended_use, domain: input.domain ?? "general" },
      store_content: false,
    }),
  });
  return await r.json();
}

async function runAgent(userMessage: string) {
  let messages: any[] = [{ role: "user", content: userMessage }];

  while (true) {
    const response = await client.messages.create({
      model: "claude-opus-4-7",
      max_tokens: 4096,
      tools: [veracityTool],
      messages,
    });

    if (response.stop_reason === "end_turn") return response;

    if (response.stop_reason === "tool_use") {
      const toolUse = response.content.find((c: any) => c.type === "tool_use");
      const result = await callVeracity(toolUse.input);
      messages.push({ role: "assistant", content: response.content });
      messages.push({
        role: "user",
        content: [{ type: "tool_result", tool_use_id: toolUse.id, content: JSON.stringify(result) }],
      });
      continue;
    }

    return response;
  }
}

Agent policy

For Claude.ai/Desktop/Cursor: configure the hosted MCP endpoint at https://api.veracityapi.com/mcp with bearer auth. For Anthropic SDK custom agents: use the tool_use pattern below with the verify_content tool definition.