diff --git a/packages/core/src/agent/system-prompt/sections.ts b/packages/core/src/agent/system-prompt/sections.ts
index f0db6e330..6d696e7d0 100644
--- a/packages/core/src/agent/system-prompt/sections.ts
+++ b/packages/core/src/agent/system-prompt/sections.ts
@@ -28,6 +28,7 @@ const CORE_TOOL_SUMMARIES: Record<string, string> = {
   web_fetch: "Fetch and extract readable content from a URL",
   memory_search: "Search memory files by keyword",
   sessions_spawn: "Spawn a sub-agent session",
+  data: "Query structured financial and market data",
 };
 
 /** Preferred display order for tools */
@@ -42,6 +43,7 @@ const TOOL_ORDER = [
   "web_fetch",
   "memory_search",
   "sessions_spawn",
+  "data",
 ];
 
 // ─── Section builders ───────────────────────────────────────────────────────
@@ -266,6 +268,17 @@ export function buildConditionalToolSections(
     );
   }
 
+  // Data tools
+  if (toolSet.has("data")) {
+    lines.push(
+      "## Data Access",
+      "You have access to structured financial and market data via the `data` tool.",
+      'Use domain="finance" with specific actions to retrieve stock prices, financial statements, SEC filings, metrics, and more.',
+      "Always specify dates in YYYY-MM-DD format. Use period='annual' or 'quarterly' or 'ttm' for financial statements.",
+      "",
+    );
+  }
+
   // Web tools
   if (toolSet.has("web_search") || toolSet.has("web_fetch")) {
     lines.push(
diff --git a/packages/core/src/agent/tools.ts b/packages/core/src/agent/tools.ts
index f3908d736..7905fc743 100644
--- a/packages/core/src/agent/tools.ts
+++ b/packages/core/src/agent/tools.ts
@@ -10,6 +10,7 @@ import { createSessionsSpawnTool } from "./tools/sessions-spawn.js";
 import { createSessionsListTool } from "./tools/sessions-list.js";
 import { createMemorySearchTool } from "./tools/memory-search.js";
 import { createCronTool } from "./tools/cron/index.js";
+import { createDataTool } from "./tools/data/index.js";
 import { filterTools } from "./tools/policy.js";
 import { isMulticaError, isRetryableError } from "@multica/utils";
 import type { ExecApprovalCallback } from "./tools/exec-approval-types.js";
@@ -110,6 +111,7 @@ export function createAllTools(options: CreateToolsOptions | string): AgentTool<
   const webSearchTool = createWebSearchTool();
 
   const cronTool = createCronTool();
+  const dataTool = createDataTool();
 
   const tools: AgentTool<any>[] = [
     ...baseTools,
@@ -119,6 +121,7 @@ export function createAllTools(options: CreateToolsOptions | string): AgentTool<
     webFetchTool as AgentTool<any>,
     webSearchTool as AgentTool<any>,
     cronTool as AgentTool<any>,
+    dataTool as AgentTool<any>,
   ];
 
   // Add memory_search tool if profileDir is provided
diff --git a/packages/core/src/agent/tools/data/data-tool.ts b/packages/core/src/agent/tools/data/data-tool.ts
new file mode 100644
index 000000000..b4bb2e997
--- /dev/null
+++ b/packages/core/src/agent/tools/data/data-tool.ts
@@ -0,0 +1,118 @@
+/**
+ * Unified data tool — structured access to domain-specific data sources.
+ *
+ * Currently supports the "finance" domain (Financial Datasets API).
+ * Designed as a stable interface: the backend can be swapped from
+ * direct API calls to a Multica Data Service without changing the tool schema.
+ */
+
+import { Type } from "@sinclair/typebox";
+import type { AgentTool } from "@mariozechner/pi-agent-core";
+import { executeFinanceAction } from "./finance/actions.js";
+
+// ─── Schema ─────────────────────────────────────────────────────────────────
+
+const DataToolSchema = Type.Object({
+  domain: Type.String({
+    description: 'Data domain. Currently supported: "finance".',
+  }),
+  action: Type.String({
+    description:
+      "Action to perform within the domain.\n\n" +
+      "FINANCE DOMAIN ACTIONS:\n" +
+      "Prices:\n" +
+      "  get_price_snapshot — params: { ticker }\n" +
+      "  get_prices — params: { ticker, start_date, end_date, interval?, interval_multiplier? }\n" +
+      "  get_crypto_price_snapshot — params: { ticker } (e.g. BTC-USD)\n" +
+      "  get_crypto_prices — params: { ticker, start_date, end_date, interval?, interval_multiplier? }\n" +
+      "  get_available_crypto_tickers — params: {}\n" +
+      "Financial Statements (period: annual|quarterly|ttm):\n" +
+      "  get_income_statements — params: { ticker, period, limit?, report_period_gt/gte/lt/lte? }\n" +
+      "  get_balance_sheets — same params\n" +
+      "  get_cash_flow_statements — same params\n" +
+      "  get_all_financial_statements — same params (returns all three)\n" +
+      "Metrics:\n" +
+      "  get_financial_metrics_snapshot — params: { ticker }\n" +
+      "  get_financial_metrics — params: { ticker, period?, limit?, report_period*? }\n" +
+      "  get_analyst_estimates — params: { ticker, period? }\n" +
+      "Company:\n" +
+      "  get_news — params: { ticker, start_date?, end_date?, limit? }\n" +
+      "  get_insider_trades — params: { ticker, limit?, filing_date*? }\n" +
+      "  get_segmented_revenues — params: { ticker, period, limit? }\n" +
+      "  get_company_facts — params: { ticker }\n" +
+      "SEC Filings:\n" +
+      "  get_filings — params: { ticker, filing_type?, limit? }\n" +
+      "  get_filing_items — params: { ticker, filing_type, accession_number?, item? }",
+  }),
+  params: Type.Record(Type.String(), Type.Unknown(), {
+    description:
+      "Action-specific parameters as key-value pairs. " +
+      "Common: ticker (string, e.g. 'AAPL'), period ('annual'|'quarterly'|'ttm'), " +
+      "limit (number), start_date/end_date ('YYYY-MM-DD'), " +
+      "interval ('day'|'week'|'month'|'year'), filing_type ('10-K'|'10-Q'|'8-K').",
+  }),
+});
+
+// ─── Types ──────────────────────────────────────────────────────────────────
+
+type DataToolArgs = {
+  domain: string;
+  action: string;
+  params: Record<string, unknown>;
+};
+
+export type DataToolResult = {
+  domain: string;
+  action: string;
+  data: unknown;
+  sourceUrl?: string;
+};
+
+// ─── Factory ────────────────────────────────────────────────────────────────
+
+export function createDataTool(): AgentTool<typeof DataToolSchema, DataToolResult> {
+  return {
+    name: "data",
+    label: "Data",
+    description:
+      "Query structured data from external sources. " +
+      'Supports domain="finance" for stock prices, financial statements, key metrics, ' +
+      "SEC filings, analyst estimates, insider trades, news, and crypto data.",
+    parameters: DataToolSchema,
+    execute: async (_toolCallId, args, signal) => {
+      const { domain, action, params } = args as DataToolArgs;
+
+      if (domain !== "finance") {
+        const errorPayload = {
+          error: true,
+          message: `Unknown domain: "${domain}". Currently supported: "finance".`,
+        };
+        return {
+          content: [{ type: "text", text: JSON.stringify(errorPayload, null, 2) }],
+          details: { domain, action, data: null } as unknown as DataToolResult,
+        };
+      }
+
+      try {
+        const result = await executeFinanceAction(action, params ?? {}, signal);
+        const payload: DataToolResult = {
+          domain,
+          action,
+          data: result.data,
+          sourceUrl: result.sourceUrl,
+        };
+        return {
+          content: [{ type: "text", text: JSON.stringify(payload, null, 2) }],
+          details: payload,
+        };
+      } catch (error) {
+        const message = error instanceof Error ? error.message : String(error);
+        const errorPayload = { error: true, domain, action, message };
+        return {
+          content: [{ type: "text", text: JSON.stringify(errorPayload, null, 2) }],
+          details: { domain, action, data: null } as unknown as DataToolResult,
+        };
+      }
+    },
+  };
+}
diff --git a/packages/core/src/agent/tools/data/finance/actions.ts b/packages/core/src/agent/tools/data/finance/actions.ts
new file mode 100644
index 000000000..557b9fcf1
--- /dev/null
+++ b/packages/core/src/agent/tools/data/finance/actions.ts
@@ -0,0 +1,295 @@
+/**
+ * Finance action handlers.
+ *
+ * Maps each action name to the corresponding Financial Datasets API call.
+ */
+
+import type { FinanceAction } from "./types.js";
+import { FINANCE_ACTION_SET } from "./types.js";
+import { financeFetch } from "./api.js";
+
+// ─── Helpers ────────────────────────────────────────────────────────────────
+
+type Params = Record<string, unknown>;
+
+function requireParam(params: Params, name: string): string {
+  const value = params[name];
+  if (value === undefined || value === null || value === "") {
+    throw new Error(`Missing required parameter: ${name}`);
+  }
+  return String(value);
+}
+
+function optionalString(params: Params, name: string): string | undefined {
+  const value = params[name];
+  if (value === undefined || value === null || value === "") return undefined;
+  return String(value);
+}
+
+function optionalNumber(params: Params, name: string): number | undefined {
+  const value = params[name];
+  if (value === undefined || value === null) return undefined;
+  return Number(value);
+}
+
+function optionalStringArray(params: Params, name: string): string[] | undefined {
+  const value = params[name];
+  if (value === undefined || value === null) return undefined;
+  if (Array.isArray(value)) return value.map(String);
+  return [String(value)];
+}
+
+/** Extract common financial statement filter params */
+function statementFilters(params: Params) {
+  return {
+    ticker: requireParam(params, "ticker"),
+    period: requireParam(params, "period"),
+    limit: optionalNumber(params, "limit"),
+    report_period_gt: optionalString(params, "report_period_gt"),
+    report_period_gte: optionalString(params, "report_period_gte"),
+    report_period_lt: optionalString(params, "report_period_lt"),
+    report_period_lte: optionalString(params, "report_period_lte"),
+  };
+}
+
+// ─── Action result type ─────────────────────────────────────────────────────
+
+export interface FinanceActionResult {
+  data: unknown;
+  sourceUrl: string;
+}
+
+// ─── Action handlers ────────────────────────────────────────────────────────
+
+type ActionHandler = (params: Params, signal?: AbortSignal) => Promise<FinanceActionResult>;
+
+const handlers: Record<FinanceAction, ActionHandler> = {
+  // ── Prices ──────────────────────────────────────────────────────────────
+
+  get_price_snapshot: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch("/prices/snapshot", { ticker }, signal);
+    return { data: (data as Record<string, unknown>).snapshot ?? data, sourceUrl: url };
+  },
+
+  get_prices: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const start_date = requireParam(params, "start_date");
+    const end_date = requireParam(params, "end_date");
+    const { data, url } = await financeFetch(
+      "/prices",
+      {
+        ticker,
+        start_date,
+        end_date,
+        interval: optionalString(params, "interval") ?? "day",
+        interval_multiplier: optionalNumber(params, "interval_multiplier"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).prices ?? data, sourceUrl: url };
+  },
+
+  get_crypto_price_snapshot: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch("/crypto/prices/snapshot", { ticker }, signal);
+    return { data: (data as Record<string, unknown>).snapshot ?? data, sourceUrl: url };
+  },
+
+  get_crypto_prices: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const start_date = requireParam(params, "start_date");
+    const end_date = requireParam(params, "end_date");
+    const { data, url } = await financeFetch(
+      "/crypto/prices",
+      {
+        ticker,
+        start_date,
+        end_date,
+        interval: optionalString(params, "interval") ?? "day",
+        interval_multiplier: optionalNumber(params, "interval_multiplier"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).prices ?? data, sourceUrl: url };
+  },
+
+  get_available_crypto_tickers: async (_params, signal) => {
+    const { data, url } = await financeFetch("/crypto/prices/tickers", {}, signal);
+    return { data: (data as Record<string, unknown>).tickers ?? data, sourceUrl: url };
+  },
+
+  // ── Financial statements ────────────────────────────────────────────────
+
+  get_income_statements: async (params, signal) => {
+    const filters = statementFilters(params);
+    const { data, url } = await financeFetch("/financials/income-statements", filters, signal);
+    return { data: (data as Record<string, unknown>).income_statements ?? data, sourceUrl: url };
+  },
+
+  get_balance_sheets: async (params, signal) => {
+    const filters = statementFilters(params);
+    const { data, url } = await financeFetch("/financials/balance-sheets", filters, signal);
+    return { data: (data as Record<string, unknown>).balance_sheets ?? data, sourceUrl: url };
+  },
+
+  get_cash_flow_statements: async (params, signal) => {
+    const filters = statementFilters(params);
+    const { data, url } = await financeFetch("/financials/cash-flow-statements", filters, signal);
+    return { data: (data as Record<string, unknown>).cash_flow_statements ?? data, sourceUrl: url };
+  },
+
+  get_all_financial_statements: async (params, signal) => {
+    const filters = statementFilters(params);
+    const { data, url } = await financeFetch("/financials", filters, signal);
+    return { data: (data as Record<string, unknown>).financials ?? data, sourceUrl: url };
+  },
+
+  // ── Metrics & estimates ─────────────────────────────────────────────────
+
+  get_financial_metrics_snapshot: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch("/financial-metrics/snapshot", { ticker }, signal);
+    return { data: (data as Record<string, unknown>).snapshot ?? data, sourceUrl: url };
+  },
+
+  get_financial_metrics: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch(
+      "/financial-metrics",
+      {
+        ticker,
+        period: optionalString(params, "period"),
+        limit: optionalNumber(params, "limit"),
+        report_period: optionalString(params, "report_period"),
+        report_period_gt: optionalString(params, "report_period_gt"),
+        report_period_gte: optionalString(params, "report_period_gte"),
+        report_period_lt: optionalString(params, "report_period_lt"),
+        report_period_lte: optionalString(params, "report_period_lte"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).financial_metrics ?? data, sourceUrl: url };
+  },
+
+  get_analyst_estimates: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch(
+      "/analyst-estimates",
+      {
+        ticker,
+        period: optionalString(params, "period"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).analyst_estimates ?? data, sourceUrl: url };
+  },
+
+  // ── Company info ────────────────────────────────────────────────────────
+
+  get_news: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch(
+      "/news",
+      {
+        ticker,
+        start_date: optionalString(params, "start_date"),
+        end_date: optionalString(params, "end_date"),
+        limit: optionalNumber(params, "limit"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).news ?? data, sourceUrl: url };
+  },
+
+  get_insider_trades: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch(
+      "/insider-trades",
+      {
+        ticker: ticker.toUpperCase(),
+        limit: optionalNumber(params, "limit"),
+        filing_date: optionalString(params, "filing_date"),
+        filing_date_gt: optionalString(params, "filing_date_gt"),
+        filing_date_gte: optionalString(params, "filing_date_gte"),
+        filing_date_lt: optionalString(params, "filing_date_lt"),
+        filing_date_lte: optionalString(params, "filing_date_lte"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).insider_trades ?? data, sourceUrl: url };
+  },
+
+  get_segmented_revenues: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const period = requireParam(params, "period");
+    const { data, url } = await financeFetch(
+      "/financials/segmented-revenues",
+      {
+        ticker,
+        period,
+        limit: optionalNumber(params, "limit"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).segmented_revenues ?? data, sourceUrl: url };
+  },
+
+  get_company_facts: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch("/company/facts", { ticker }, signal);
+    return { data: (data as Record<string, unknown>).company_facts ?? data, sourceUrl: url };
+  },
+
+  // ── SEC filings ─────────────────────────────────────────────────────────
+
+  get_filings: async (params, signal) => {
+    const ticker = requireParam(params, "ticker");
+    const { data, url } = await financeFetch(
+      "/filings",
+      {
+        ticker,
+        filing_type: optionalString(params, "filing_type"),
+        limit: optionalNumber(params, "limit"),
+      },
+      signal,
+    );
+    return { data: (data as Record<string, unknown>).filings ?? data, sourceUrl: url };
+  },
+
+  get_filing_items: async (params, signal) => {
+    const ticker = requireParam(params, "ticker").toUpperCase();
+    const filing_type = requireParam(params, "filing_type");
+    const { data, url } = await financeFetch(
+      "/filings/items",
+      {
+        ticker,
+        filing_type,
+        accession_number: optionalString(params, "accession_number"),
+        item: optionalStringArray(params, "item"),
+      },
+      signal,
+    );
+    return { data, sourceUrl: url };
+  },
+};
+
+// ─── Public API ─────────────────────────────────────────────────────────────
+
+/**
+ * Execute a finance domain action.
+ *
+ * @throws Error if the action is unknown or required params are missing.
+ */
+export function executeFinanceAction(
+  action: string,
+  params: Record<string, unknown>,
+  signal?: AbortSignal,
+): Promise<FinanceActionResult> {
+  if (!FINANCE_ACTION_SET.has(action)) {
+    throw new Error(
+      `Unknown finance action: "${action}". Available: ${[...FINANCE_ACTION_SET].join(", ")}`,
+    );
+  }
+  return handlers[action as FinanceAction](params, signal);
+}
diff --git a/packages/core/src/agent/tools/data/finance/api.ts b/packages/core/src/agent/tools/data/finance/api.ts
new file mode 100644
index 000000000..c775291b1
--- /dev/null
+++ b/packages/core/src/agent/tools/data/finance/api.ts
@@ -0,0 +1,74 @@
+/**
+ * Financial Datasets API client.
+ *
+ * Base URL: https://api.financialdatasets.ai
+ * Auth: X-API-KEY header
+ * All endpoints use GET with query parameters.
+ */
+
+import { credentialManager } from "../../../credentials.js";
+
+const BASE_URL = "https://api.financialdatasets.ai";
+const TIMEOUT_MS = 30_000;
+
+function getApiKey(): string {
+  const key = credentialManager.getEnv("FINANCIAL_DATASETS_API_KEY");
+  if (!key) {
+    throw new Error(
+      "FINANCIAL_DATASETS_API_KEY not configured. " +
+        "Set it in ~/.super-multica/skills.env.json5 under env, or as an environment variable.",
+    );
+  }
+  return key;
+}
+
+/**
+ * Fetch data from the Financial Datasets API.
+ *
+ * @param path - API path (e.g., "/prices/snapshot")
+ * @param params - Query parameters. Arrays are sent as repeated params (e.g., item=1A&item=1B).
+ * @param signal - Optional AbortSignal for cancellation.
+ */
+export async function financeFetch<T = Record<string, unknown>>(
+  path: string,
+  params: Record<string, string | string[] | number | boolean | undefined>,
+  signal?: AbortSignal,
+): Promise<{ data: T; url: string }> {
+  const apiKey = getApiKey();
+
+  const url = new URL(path, BASE_URL);
+  for (const [key, value] of Object.entries(params)) {
+    if (value === undefined || value === null) continue;
+    if (Array.isArray(value)) {
+      for (const v of value) {
+        url.searchParams.append(key, String(v));
+      }
+    } else {
+      url.searchParams.set(key, String(value));
+    }
+  }
+
+  const timeoutSignal = AbortSignal.timeout(TIMEOUT_MS);
+  const combinedSignal = signal
+    ? AbortSignal.any([signal, timeoutSignal])
+    : timeoutSignal;
+
+  const res = await fetch(url.toString(), {
+    method: "GET",
+    headers: {
+      "X-API-KEY": apiKey,
+      Accept: "application/json",
+    },
+    signal: combinedSignal,
+  });
+
+  if (!res.ok) {
+    const body = await res.text().catch(() => "");
+    throw new Error(
+      `Financial Datasets API error (${res.status}): ${body || res.statusText}`,
+    );
+  }
+
+  const data = (await res.json()) as T;
+  return { data, url: url.toString() };
+}
diff --git a/packages/core/src/agent/tools/data/finance/types.ts b/packages/core/src/agent/tools/data/finance/types.ts
new file mode 100644
index 000000000..82fa4342d
--- /dev/null
+++ b/packages/core/src/agent/tools/data/finance/types.ts
@@ -0,0 +1,35 @@
+/**
+ * Finance domain types for the data tool.
+ */
+
+/** All supported finance actions */
+export const FINANCE_ACTIONS = [
+  // Price data
+  "get_price_snapshot",
+  "get_prices",
+  "get_crypto_price_snapshot",
+  "get_crypto_prices",
+  "get_available_crypto_tickers",
+  // Financial statements
+  "get_income_statements",
+  "get_balance_sheets",
+  "get_cash_flow_statements",
+  "get_all_financial_statements",
+  // Metrics & estimates
+  "get_financial_metrics_snapshot",
+  "get_financial_metrics",
+  "get_analyst_estimates",
+  // Company info
+  "get_news",
+  "get_insider_trades",
+  "get_segmented_revenues",
+  "get_company_facts",
+  // SEC filings
+  "get_filings",
+  "get_filing_items",
+] as const;
+
+export type FinanceAction = (typeof FINANCE_ACTIONS)[number];
+
+/** Set for O(1) lookup */
+export const FINANCE_ACTION_SET = new Set<string>(FINANCE_ACTIONS);
diff --git a/packages/core/src/agent/tools/data/index.ts b/packages/core/src/agent/tools/data/index.ts
new file mode 100644
index 000000000..7712b0813
--- /dev/null
+++ b/packages/core/src/agent/tools/data/index.ts
@@ -0,0 +1 @@
+export { createDataTool, type DataToolResult } from "./data-tool.js";
diff --git a/packages/core/src/agent/tools/groups.ts b/packages/core/src/agent/tools/groups.ts
index f61c9037a..a2bbed126 100644
--- a/packages/core/src/agent/tools/groups.ts
+++ b/packages/core/src/agent/tools/groups.ts
@@ -39,6 +39,9 @@ export const TOOL_GROUPS: Record<string, string[]> = {
   // Cron/scheduling tools
   "group:cron": ["cron"],
 
+  // Data tools (finance, etc.)
+  "group:data": ["data"],
+
   // All core tools
   "group:core": [
     "read",
@@ -49,6 +52,7 @@ export const TOOL_GROUPS: Record<string, string[]> = {
     "process",
     "web_search",
     "web_fetch",
+    "data",
   ],
 };
 
diff --git a/packages/core/src/agent/tools/index.ts b/packages/core/src/agent/tools/index.ts
index e225c54cd..3e148e1a9 100644
--- a/packages/core/src/agent/tools/index.ts
+++ b/packages/core/src/agent/tools/index.ts
@@ -8,6 +8,7 @@ export { createProcessTool } from "./process.js";
 export { createGlobTool } from "./glob.js";
 export { createWebFetchTool, createWebSearchTool } from "./web/index.js";
 export { createCronTool } from "./cron/index.js";
+export { createDataTool } from "./data/index.js";
 export { createSessionsListTool } from "./sessions-list.js";
 
 // Tool groups