Whale Changes

Instructions

Implementation Reference

• src/tools/whales.ts:232-258 (handler)

  Handler function for the whale_changes tool. Accepts `since` (ISO 8601 timestamp) and optional `limit` (1-100, default 50). Calls GET /api/v1/whales/changes and returns formatted results with count and data.

  async ({ since, limit }) => {
    const res = await apiGet<WhaleQueryResponse>("/api/v1/whales/changes", {
      since,
      limit: limit ?? 50,
    });
  
    if (!res.ok) {
      return {
        content: [
          {
            type: "text" as const,
            text: `API error (${res.status}): ${JSON.stringify(res.data)}`,
          },
        ],
        isError: true,
      };
    }
  
    const { count, data } = res.data;
    const warn = stalenessWarning(res);
    const summary = `${warn}Found ${count} whale change(s) since ${since}.`;
    const json = JSON.stringify(data, null, 2);
  
    return {
      content: [{ type: "text" as const, text: `${summary}\n\n${json}` }],
    };
  },

• src/tools/whales.ts:219-230 (schema)

  Input schema for whale_changes using Zod: `since` (required string, ISO 8601) and `limit` (optional integer, 1-100, default 50).

  inputSchema: {
    since: z
      .string()
      .describe("ISO 8601 timestamp to get changes since (e.g. 2026-03-01T00:00:00Z)"),
    limit: z
      .number()
      .int()
      .min(1)
      .max(100)
      .optional()
      .describe("Maximum results (default 50)"),
  },

• src/tools/whales.ts:212-259 (registration)

  Registration of the whale_changes tool via server.registerTool() with name 'whale_changes', title 'Whale Changes', description, input schema, and handler.

  server.registerTool(
    "whale_changes",
    {
      title: "Whale Changes",
      description:
        "Get recent changes to whale wallet data since a given timestamp. " +
        "Cost: $0.01 per query. Source: On-chain analytics.",
      inputSchema: {
        since: z
          .string()
          .describe("ISO 8601 timestamp to get changes since (e.g. 2026-03-01T00:00:00Z)"),
        limit: z
          .number()
          .int()
          .min(1)
          .max(100)
          .optional()
          .describe("Maximum results (default 50)"),
      },
    },
    async ({ since, limit }) => {
      const res = await apiGet<WhaleQueryResponse>("/api/v1/whales/changes", {
        since,
        limit: limit ?? 50,
      });
  
      if (!res.ok) {
        return {
          content: [
            {
              type: "text" as const,
              text: `API error (${res.status}): ${JSON.stringify(res.data)}`,
            },
          ],
          isError: true,
        };
      }
  
      const { count, data } = res.data;
      const warn = stalenessWarning(res);
      const summary = `${warn}Found ${count} whale change(s) since ${since}.`;
      const json = JSON.stringify(data, null, 2);
  
      return {
        content: [{ type: "text" as const, text: `${summary}\n\n${json}` }],
      };
    },
  );

• src/index.ts:49-49 (registration)

  The registerWhaleTools function (containing whale_changes) is called during server setup in src/index.ts.

  registerWhaleTools(server);