feat: add Surf to service directory

Unified pay-per-use research and inference API for AI agents at
surf.cascade.fyi. 10 composite REST endpoints (Twitter, Reddit, Web,
Inference) + MCP server. First-party MPP, no signup or API keys.

Author: tenequm

public/icons/surf.svg

@@ -5581,4 +5581,54 @@ export const services: ServiceDef[] = [
       },
     ],
   },
+
+  // ── Surf ─────────────────────────────────────────────────────────────
+  {
+    id: "surf",
+    name: "Surf",
+    url: "https://surf.cascade.fyi",
+    serviceUrl: "https://surf.cascade.fyi",
+    description:
+      "Pay-per-use research and inference API for AI agents. Twitter, Reddit, web data, and LLM inference - no signup, no API keys.",
+    categories: ["ai", "data", "search", "social", "web"],
+    integration: "first-party",
+    tags: [
+      "twitter",
+      "reddit",
+      "web",
+      "crawl",
+      "search",
+      "inference",
+      "llm",
+      "mcp",
+      "agents",
+    ],
+    docs: {
+      homepage: "https://surf.cascade.fyi",
+      apiReference: "https://surf.cascade.fyi",
+    },
+    provider: { name: "Cascade", url: "https://surf.cascade.fyi" },
+    realm: "surf.cascade.fyi",
+    intent: "charge",
+    payment: TEMPO_PAYMENT,
+    endpoints: [
+      { route: "POST /api/v1/twitter/search", desc: "Search tweets with advanced operators", amount: "5000" },
+      { route: "POST /api/v1/twitter/tweet", desc: "Fetch tweet with full thread context", amount: "5000" },
+      { route: "POST /api/v1/twitter/user", desc: "Fetch user profile with recent tweets", amount: "5000" },
+      { route: "POST /api/v1/reddit/search", desc: "Search Reddit posts", amount: "5000" },
+      { route: "POST /api/v1/reddit/post", desc: "Fetch post with comments", amount: "5000" },
+      { route: "POST /api/v1/reddit/subreddit", desc: "Subreddit info and top posts", amount: "5000" },
+      { route: "POST /api/v1/reddit/user", desc: "User profile with recent activity", amount: "5000" },
+      { route: "POST /api/v1/web/search", desc: "AI-powered web search", amount: "10000" },
+      { route: "POST /api/v1/web/crawl", desc: "Crawl URL to markdown or HTML", amount: "2000" },
+      {
+        route: "POST /api/v1/inference/completions",
+        desc: "Chat completions with 15 models - price varies by model and tokens",
+        dynamic: true,
+        amountHint: "$0.001 - $25.00 per 1M tokens",
+        intent: "session",
+      },
+      { route: "GET /api/v1/inference/models", desc: "List available models" },
+    ],
+  },
 ];