diff --git a/SPEC.md b/SPEC.md
index e115dab..7b86f6e 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -24,6 +24,8 @@ The endpoint MUST accept:
 - Request `Content-Type`: `application/json`
 - Response `Content-Type`: `application/json`
 
+A request whose `Content-Type` media type is not `application/json` MUST be rejected with the response defined in section 7 with `error.code` of `unsupported_media_type` and HTTP status `415`. Only the media type is significant: servers MUST ignore parameters such as `charset`, so `application/json; charset=utf-8` is accepted.
+
 The endpoint MAY accept other methods (e.g. `OPTIONS` for CORS preflight) but their semantics are out of scope.
 
 ## 3. Authentication
@@ -158,16 +160,19 @@ HTTP status: `4xx` or `5xx`.
 
 Registered error codes in v0.1:
 
-| `code`              | HTTP | Meaning                                                         |
-|---------------------|------|-----------------------------------------------------------------|
-| `bad_request`       | 400  | Request body shape is invalid.                                  |
-| `sql_error`         | 400  | The SQL is invalid or failed at runtime.                        |
-| `not_allowed`       | 400  | Statement shape is rejected by server policy.                   |
-| `auth_error`        | 401  | Missing or invalid credentials.                                 |
-| `permission_error`  | 403  | Authenticated but not permitted to run the statement.           |
-| `payload_too_large` | 413  | Request body or result set exceeds a server limit.              |
-| `rate_limited`      | 429  | Too many requests.                                              |
-| `internal_error`    | 500  | Server malfunction.                                             |
+| `code`                   | HTTP | Meaning                                                         |
+|--------------------------|------|-----------------------------------------------------------------|
+| `bad_request`            | 400  | Request body shape is invalid.                                  |
+| `sql_error`              | 400  | The SQL is invalid or failed at runtime.                        |
+| `not_allowed`            | 400  | Statement shape is rejected by server policy.                   |
+| `auth_error`             | 401  | Missing or invalid credentials.                                 |
+| `permission_error`       | 403  | Authenticated but not permitted to run the statement.           |
+| `payload_too_large`      | 413  | Request body or result set exceeds a server limit.              |
+| `unsupported_media_type` | 415  | Request `Content-Type` media type is not `application/json`.    |
+| `rate_limited`           | 429  | Too many requests.                                              |
+| `internal_error`         | 500  | Server malfunction.                                             |
+
+`unsupported_media_type` is introduced in v0.2. Per section 11, a new registered error code is an additive change that increments the minor version; this spec has no patch level, so the code is not available to a server that advertises `0.1`.
 
 Vendor codes carry the prefix `vendor:` (e.g. `vendor:cf_d1_quota_exceeded`). Clients SHOULD treat unknown `error.code` values as if they were the closest registered code by HTTP status family.
 
@@ -199,7 +204,7 @@ to indicate the maximum spec version they understand. Servers MAY use this for f
 
 A v0.1 conforming server MUST:
 
-1. Accept POST requests with `Content-Type: application/json` at one or more endpoint URLs.
+1. Accept POST requests with `Content-Type: application/json` at one or more endpoint URLs, and reject other media types per section 2.
 2. Accept both single-statement (section 4.1) and batch (section 4.2) request shapes.
 3. Return the success envelopes defined in section 6 for successful execution.
 4. Return the error envelope defined in section 7 for any failure, using the HTTP status codes in the table.
diff --git a/conformance/README.md b/conformance/README.md
index d4f1811..a94594c 100644
--- a/conformance/README.md
+++ b/conformance/README.md
@@ -2,6 +2,8 @@
 
 A conforming http-sql v0.1 server passes the test cases below when probed at its endpoint URL with a valid bearer token.
 
+Cases marked `(v0.2+)` exercise behavior introduced after v0.1 and are not required of a server that advertises `X-Http-Sql-Version: 0.1`.
+
 This directory will contain a runnable TypeScript test suite. The current document defines the test cases that runner must implement, so server implementers can self-check before installing the runner.
 
 ## How conformance is claimed
@@ -29,7 +31,8 @@ Conformance is self-asserted. The community can call out failures via issues.
 | R-1   | Body contains both `sql` and `batch`                             | 400, `error.code` = `bad_request`           |
 | R-2   | Body contains neither `sql` nor `batch`                          | 400, `error.code` = `bad_request`           |
 | R-3   | Body is not valid JSON                                           | 400, `error.code` = `bad_request`           |
-| R-4   | `Content-Type` other than `application/json`                     | 400 or 415                                  |
+| R-4   | `Content-Type` other than `application/json` (v0.2+)             | 415, `error.code` = `unsupported_media_type` |
+| R-5   | `Content-Type: application/json; charset=utf-8`                   | Executes normally -- media-type parameters are ignored |
 
 ### Single-statement execution
 
diff --git a/examples/cloudflare-durable-object/src/index.ts b/examples/cloudflare-durable-object/src/index.ts
index 482a3b4..ae09e87 100644
--- a/examples/cloudflare-durable-object/src/index.ts
+++ b/examples/cloudflare-durable-object/src/index.ts
@@ -31,6 +31,10 @@ app.post("/sql", async (c) => {
   const tenant = resolveTenant(c.req.header("authorization") ?? "", c.env);
   if (!tenant) return c.json({ error: { code: "auth_error", message: "missing or invalid bearer token" } }, 401);
 
+  if (!isJsonMediaType(c.req.header("content-type"))) {
+    return c.json({ error: { code: "unsupported_media_type", message: "Content-Type must be application/json" } }, 415);
+  }
+
   const id = c.env.TENANT_DO.idFromName(tenant);
   const stub = c.env.TENANT_DO.get(id);
   return stub.fetch(c.req.raw);
@@ -43,6 +47,12 @@ app.onError((err, c) => {
 
 export default app;
 
+// SPEC.md section 2: only the media type is significant, so parameters such as
+// `charset=utf-8` are ignored.
+function isJsonMediaType(header: string | undefined): boolean {
+  return header?.split(";")[0].trim().toLowerCase() === "application/json";
+}
+
 function resolveTenant(header: string, env: Env): string | null {
   const token = header.replace(/^Bearer\s+/i, "").trim();
   if (!token) return null;
diff --git a/examples/cloudflare-worker-to-d1/src/index.ts b/examples/cloudflare-worker-to-d1/src/index.ts
index 2918988..972d7f9 100644
--- a/examples/cloudflare-worker-to-d1/src/index.ts
+++ b/examples/cloudflare-worker-to-d1/src/index.ts
@@ -38,6 +38,10 @@ app.post(
   "/",
   async (c, next) => bearerAuth({ token: c.env.HTTP_SQL_TOKEN })(c, next),
   async (c) => {
+    if (!isJsonMediaType(c.req.header("content-type"))) {
+      return c.json({ error: { code: "unsupported_media_type", message: "Content-Type must be application/json" } }, 415);
+    }
+
     let body: SingleRequest | BatchRequest;
     try { body = await c.req.json(); }
     catch { return c.json({ error: { code: "bad_request", message: "invalid JSON" } }, 400); }
@@ -115,6 +119,12 @@ function projectD1Result(res: D1Result): StatementResult {
   };
 }
 
+// SPEC.md section 2: only the media type is significant, so parameters such as
+// `charset=utf-8` are ignored.
+function isJsonMediaType(header: string | undefined): boolean {
+  return header?.split(";")[0].trim().toLowerCase() === "application/json";
+}
+
 // Tagged values per SPEC.md section 5.
 function decodeParam(value: unknown): unknown {
   if (value && typeof value === "object" && "$type" in value && "$value" in value) {
diff --git a/examples/reference-server.ts b/examples/reference-server.ts
index 15f0f99..26578f3 100644
--- a/examples/reference-server.ts
+++ b/examples/reference-server.ts
@@ -22,6 +22,9 @@ const JSON_HEADERS = { "content-type": "application/json", ...VERSION_HEADER };
 export async function handle(req: Request, auth: (req: Request) => boolean): Promise<Response> {
   if (!auth(req)) return errorResponse(401, "auth_error", "missing or invalid bearer token");
   if (req.method !== "POST") return errorResponse(405, "bad_request", "POST required");
+  if (!isJsonMediaType(req.headers.get("content-type"))) {
+    return errorResponse(415, "unsupported_media_type", "Content-Type must be application/json");
+  }
 
   let body: RequestBody;
   try { body = await req.json(); }
@@ -47,6 +50,12 @@ export async function handle(req: Request, auth: (req: Request) => boolean): Pro
   }
 }
 
+// SPEC.md section 2: only the media type is significant, so parameters such as
+// `charset=utf-8` are ignored.
+function isJsonMediaType(header: string | null): boolean {
+  return header?.split(";")[0].trim().toLowerCase() === "application/json";
+}
+
 // Replace these with calls to your actual database client.
 async function execute(_stmt: Statement): Promise<Result> {
   return { columns: [], rows: [], rowsAffected: 0, lastInsertId: null };