diff --git a/.changeset/nine-buckets-provide.md b/.changeset/nine-buckets-provide.md
new file mode 100644
index 0000000000000..b6d5360b0b2bb
--- /dev/null
+++ b/.changeset/nine-buckets-provide.md
@@ -0,0 +1,5 @@
+---
+'@omnigraph/openapi': patch
+---
+
+fix(openapi): allow user to override accept from the schema
diff --git a/packages/loaders/openapi/src/getJSONSchemaOptionsFromOpenAPIOptions.ts b/packages/loaders/openapi/src/getJSONSchemaOptionsFromOpenAPIOptions.ts
index 9d07c0b1694e8..e35ab2100e217 100644
--- a/packages/loaders/openapi/src/getJSONSchemaOptionsFromOpenAPIOptions.ts
+++ b/packages/loaders/openapi/src/getJSONSchemaOptionsFromOpenAPIOptions.ts
@@ -299,7 +299,16 @@ export async function getJSONSchemaOptionsFromOpenAPIOptions(
             oneOf: [],
           };
 
-          const allMimeTypes = Object.keys(responseObj.content);
+          let allMimeTypes: string[] = [];
+          if (typeof operationHeaders === 'object') {
+            const acceptFromOperationHeader = operationHeaders.accept || operationHeaders.Accept;
+            if (acceptFromOperationHeader) {
+              allMimeTypes = [acceptFromOperationHeader];
+            }
+          }
+          if (allMimeTypes.length === 0) {
+            allMimeTypes = Object.keys(responseObj.content) as string[];
+          }
           const jsonLikeMimeTypes = allMimeTypes.filter(c => c !== '*/*' && c.toString().includes('json'));
           const mimeTypes = jsonLikeMimeTypes.length > 0 ? jsonLikeMimeTypes : allMimeTypes;
 
diff --git a/packages/loaders/openapi/tests/__snapshots__/basket.test.ts.snap b/packages/loaders/openapi/tests/__snapshots__/basket.test.ts.snap
index 0fad5fedb5b81..5f7c3878eb863 100644
--- a/packages/loaders/openapi/tests/__snapshots__/basket.test.ts.snap
+++ b/packages/loaders/openapi/tests/__snapshots__/basket.test.ts.snap
@@ -10,11 +10,15 @@ Object {
       "description": undefined,
       "field": "post_basket",
       "headers": Object {
+        "Content-Type": "application/json",
         "accept": "application/json",
       },
       "method": "POST",
       "operationHeaders": undefined,
       "path": "/basket",
+      "requestSchema": Object {
+        "type": "string",
+      },
       "responseByStatusCode": Object {
         "200": Object {
           "responseSchema": Object {
@@ -279,7 +283,11 @@ Object {
         "type": "object",
       },
       "MutationInput": Object {
-        "additionalProperties": true,
+        "properties": Object {
+          "post_basket": Object {
+            "$ref": "#/definitions/mutationInput_post_basket",
+          },
+        },
         "title": "MutationInput",
         "type": "object",
         "writeOnly": true,
@@ -324,6 +332,15 @@ Object {
         "title": "_schema",
         "type": "object",
       },
+      "mutationInput_post_basket": Object {
+        "properties": Object {
+          "input": Object {
+            "type": "string",
+          },
+        },
+        "title": "mutationInput_post_basket",
+        "type": "object",
+      },
       "mutation_post_basket_oneOf_0_products_items": Object {
         "oneOf": Array [
           Object {
@@ -418,7 +435,7 @@ type LocationModel {
 }
 
 type Mutation {
-  post_basket: [post_basket_response]
+  post_basket(input: String): [post_basket_response]
 }
 
 union post_basket_response = BasketResponse | ApiError
diff --git a/packages/loaders/openapi/tests/basket.test.ts b/packages/loaders/openapi/tests/basket.test.ts
index 1040691987ad7..8de6673797fe2 100644
--- a/packages/loaders/openapi/tests/basket.test.ts
+++ b/packages/loaders/openapi/tests/basket.test.ts
@@ -1,4 +1,6 @@
 import { printSchemaWithDirectives } from '@graphql-tools/utils';
+import { Headers } from '@whatwg-node/fetch';
+import { execute, parse } from 'graphql';
 import loadGraphQLSchemaFromOpenAPI, { createBundle } from '../src';
 
 describe('Basket', () => {
@@ -16,4 +18,35 @@ describe('Basket', () => {
     });
     expect(printSchemaWithDirectives(schema)).toMatchSnapshot();
   });
+  it('user can override accept value defined by the schema', async () => {
+    const providedAccept = 'application/random+json';
+    let givenHeader: string;
+    const schema = await loadGraphQLSchemaFromOpenAPI('basket', {
+      source: './fixtures/basket.json',
+      cwd: __dirname,
+      operationHeaders: {
+        accept: providedAccept,
+      },
+      async fetch(input, init) {
+        const headers = new Headers(init?.headers);
+        givenHeader = headers.get('accept');
+        return new Response(
+          JSON.stringify({
+            random: 2,
+          })
+        );
+      },
+    });
+    await execute({
+      schema,
+      document: parse(/* GraphQL */ `
+        mutation {
+          post_basket(input: "test") {
+            __typename
+          }
+        }
+      `),
+    });
+    expect(givenHeader).toBe(providedAccept);
+  });
 });
diff --git a/packages/loaders/openapi/tests/fixtures/basket.json b/packages/loaders/openapi/tests/fixtures/basket.json
index c32f0a5b51ae9..0230a1eba3f9e 100644
--- a/packages/loaders/openapi/tests/fixtures/basket.json
+++ b/packages/loaders/openapi/tests/fixtures/basket.json
@@ -7,6 +7,15 @@
   "paths": {
     "/basket": {
       "post": {
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "type": "string"
+              }
+            }
+          }
+        },
         "responses": {
           "200": {
             "description": "Success",