diff --git a/open-sse/config/providers/registry/free-ai/index.ts b/open-sse/config/providers/registry/free-ai/index.ts
new file mode 100644
index 0000000000..a055dab8db
--- /dev/null
+++ b/open-sse/config/providers/registry/free-ai/index.ts
@@ -0,0 +1,11 @@
+import type { RegistryEntry } from "../../shared.ts";
+import { buildOpenAiCompatibleRegistryEntry } from "../../shared.ts";
+
+export const freeAiProvider: RegistryEntry = buildOpenAiCompatibleRegistryEntry({
+  id: "free-ai",
+  alias: "free-ai",
+  baseUrl: "https://api.free.ai/v1/chat/",
+  modelsUrl: "https://api.free.ai/v1/models",
+  models: [],
+  passthroughModels: true,
+});
diff --git a/tests/unit/free-tier-providers-wave4-b.test.ts b/tests/unit/free-tier-providers-wave4-b.test.ts
new file mode 100644
index 0000000000..a547e150a0
--- /dev/null
+++ b/tests/unit/free-tier-providers-wave4-b.test.ts
@@ -0,0 +1,27 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { freeAiProvider } from "../../open-sse/config/providers/registry/free-ai/index.ts";
+import {
+  DefaultExecutor,
+  getExecutor,
+  hasSpecializedExecutor,
+} from "../../open-sse/executors/index.ts";
+
+test("Free.ai exposes its exact OpenAI-compatible endpoint and live catalog", () => {
+  assert.equal(freeAiProvider.id, "free-ai");
+  assert.equal(freeAiProvider.alias, "free-ai");
+  assert.equal(freeAiProvider.format, "openai");
+  assert.equal(freeAiProvider.executor, "default");
+  assert.equal(freeAiProvider.authType, "apikey");
+  assert.equal(freeAiProvider.authHeader, "bearer");
+  assert.equal(freeAiProvider.baseUrl, "https://api.free.ai/v1/chat/");
+  assert.equal(freeAiProvider.modelsUrl, "https://api.free.ai/v1/models");
+  assert.deepEqual(freeAiProvider.models, []);
+  assert.equal(freeAiProvider.passthroughModels, true);
+});
+
+test("Free.ai uses DefaultExecutor without a specialized executor", () => {
+  assert.ok(getExecutor("free-ai") instanceof DefaultExecutor);
+  assert.equal(hasSpecializedExecutor("free-ai"), false);
+});