diff --git a/packages/fixtures/valid/basic-openapi/agentic.config.ts b/packages/fixtures/valid/basic-openapi/agentic.config.ts
new file mode 100644
index 00000000..9b87f2a2
--- /dev/null
+++ b/packages/fixtures/valid/basic-openapi/agentic.config.ts
@@ -0,0 +1,10 @@
+import { defineConfig } from '@agentic/platform'
+
+export default defineConfig({
+  name: 'test-basic-openapi',
+  originUrl: 'https://jsonplaceholder.typicode.com',
+  originAdapter: {
+    type: 'openapi',
+    spec: './jsonplaceholder.json'
+  }
+})
diff --git a/packages/fixtures/valid/basic-openapi/jsonplaceholder.json b/packages/fixtures/valid/basic-openapi/jsonplaceholder.json
new file mode 100644
index 00000000..9d13bd8c
--- /dev/null
+++ b/packages/fixtures/valid/basic-openapi/jsonplaceholder.json
@@ -0,0 +1,241 @@
+{
+  "openapi": "3.1.0",
+  "info": {
+    "title": "JSONPlaceholder",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/posts": {
+      "get": {
+        "summary": "Get posts",
+        "operationId": "getPosts",
+        "responses": {
+          "200": {
+            "description": "Success",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/Post"
+                  }
+                }
+              }
+            }
+          }
+        }
+      },
+      "post": {
+        "summary": "Create post",
+        "operationId": "createPost",
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "type": "object",
+                "required": ["userId", "title", "body"],
+                "properties": {
+                  "userId": {
+                    "type": "integer"
+                  },
+                  "title": {
+                    "type": "string"
+                  },
+                  "body": {
+                    "type": "string"
+                  }
+                }
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "Success",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Post"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/posts/{postId}": {
+      "get": {
+        "summary": "Get post",
+        "operationId": "getPost",
+        "parameters": [
+          {
+            "required": true,
+            "schema": {
+              "title": "postId",
+              "type": "string"
+            },
+            "name": "postId",
+            "in": "path"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Post"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Post": {
+        "type": "object",
+        "required": ["id", "userId", "title", "body"],
+        "properties": {
+          "id": {
+            "type": "integer"
+          },
+          "userId": {
+            "type": "integer"
+          },
+          "title": {
+            "type": "string"
+          },
+          "body": {
+            "type": "string"
+          }
+        }
+      },
+      "Comment": {
+        "type": "object",
+        "required": ["id", "postId", "name", "email", "body"],
+        "properties": {
+          "id": {
+            "type": "integer"
+          },
+          "postId": {
+            "type": "integer"
+          },
+          "name": {
+            "type": "string"
+          },
+          "email": {
+            "type": "string"
+          },
+          "body": {
+            "type": "string"
+          }
+        }
+      },
+      "Todo": {
+        "type": "object",
+        "required": ["id", "userId", "title", "completed"],
+        "properties": {
+          "id": {
+            "type": "integer"
+          },
+          "userId": {
+            "type": "integer"
+          },
+          "title": {
+            "type": "string"
+          },
+          "completed": {
+            "type": "boolean"
+          }
+        }
+      },
+      "User": {
+        "type": "object",
+        "properties": {
+          "id": {
+            "type": "number"
+          },
+          "name": {
+            "type": "string"
+          },
+          "username": {
+            "type": "string"
+          },
+          "email": {
+            "type": "string"
+          },
+          "address": {
+            "type": "object",
+            "properties": {
+              "street": {
+                "type": "string"
+              },
+              "suite": {
+                "type": "string"
+              },
+              "city": {
+                "type": "string"
+              },
+              "zipcode": {
+                "type": "string"
+              },
+              "geo": {
+                "type": "object",
+                "properties": {
+                  "lat": {
+                    "type": "string"
+                  },
+                  "lng": {
+                    "type": "string"
+                  }
+                },
+                "required": ["lat", "lng"]
+              }
+            },
+            "required": ["street", "suite", "city", "zipcode", "geo"]
+          },
+          "phone": {
+            "type": "string"
+          },
+          "website": {
+            "type": "string"
+          },
+          "company": {
+            "type": "object",
+            "properties": {
+              "name": {
+                "type": "string"
+              },
+              "catchPhrase": {
+                "type": "string"
+              },
+              "bs": {
+                "type": "string"
+              }
+            },
+            "required": ["name", "catchPhrase", "bs"]
+          }
+        },
+        "required": [
+          "id",
+          "name",
+          "username",
+          "email",
+          "address",
+          "phone",
+          "website",
+          "company"
+        ]
+      }
+    }
+  },
+  "servers": [
+    {
+      "url": "https://jsonplaceholder.typicode.com"
+    }
+  ]
+}
diff --git a/packages/openapi-utils/src/validate-openapi-spec.ts b/packages/openapi-utils/src/validate-openapi-spec.ts
index 9cf95534..8f2f4cbe 100644
--- a/packages/openapi-utils/src/validate-openapi-spec.ts
+++ b/packages/openapi-utils/src/validate-openapi-spec.ts
@@ -1,3 +1,5 @@
+import fs from 'node:fs/promises'
+import path from 'node:path'
 import { fileURLToPath } from 'node:url'
 
 import { assert, type Logger, parseJson } from '@agentic/platform-core'
@@ -38,7 +40,7 @@ export async function validateOpenAPISpec<
     silent = false,
     dereference = false
   }: {
-    cwd?: URL
+    cwd?: string
     redoclyConfig?: RedoclyConfig
     logger?: Logger
     silent?: boolean
@@ -56,7 +58,7 @@ export async function validateOpenAPISpec<
     absoluteRef =
       source.protocol === 'file:' ? fileURLToPath(source) : source.href
   } else {
-    absoluteRef = fileURLToPath(new URL(cwd ?? `file://${process.cwd()}/`))
+    absoluteRef = cwd ?? process.cwd()
   }
 
   const resolver = new BaseResolver(redoclyConfig.resolve)
@@ -168,6 +170,19 @@ async function parseSchema(
       }
     }
 
+    // Path to local file
+    // TODO: support raw local files (no ./ prefix)
+    if (schema.startsWith('/') || schema.startsWith('.')) {
+      const schemaPath = path.join(absoluteRef, schema)
+      const schemaContent = await fs.readFile(schemaPath, 'utf8')
+
+      // TODO: support local YAML files
+      return {
+        source: new Source(schemaPath, schemaContent, 'application/json'),
+        parsed: parseJson(schemaContent)
+      }
+    }
+
     // YAML
     const result = makeDocumentFromString(schema, absoluteRef)
     if (
diff --git a/packages/platform/src/__snapshots__/load-agentic-config.test.ts.snap b/packages/platform/src/__snapshots__/load-agentic-config.test.ts.snap
index a5217668..d598cd24 100644
--- a/packages/platform/src/__snapshots__/load-agentic-config.test.ts.snap
+++ b/packages/platform/src/__snapshots__/load-agentic-config.test.ts.snap
@@ -1,5 +1,35 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
+exports[`loadAgenticConfig > basic-openapi 1`] = `
+{
+  "name": "test-basic-openapi",
+  "originAdapter": {
+    "location": "external",
+    "spec": "{"openapi":"3.1.0","info":{"title":"JSONPlaceholder","version":"1.0.0"},"paths":{"/posts":{"get":{"summary":"Get posts","operationId":"getPosts","responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"type":"array","items":{"$ref":"#/components/schemas/Post"}}}}}}},"post":{"summary":"Create post","operationId":"createPost","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","required":["userId","title","body"],"properties":{"userId":{"type":"integer"},"title":{"type":"string"},"body":{"type":"string"}}}}}},"responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/Post"}}}}}}},"/posts/{postId}":{"get":{"summary":"Get post","operationId":"getPost","parameters":[{"required":true,"schema":{"title":"postId","type":"string"},"name":"postId","in":"path"}],"responses":{"200":{"description":"Success","content":{"application/json":{"schema":{"$ref":"#/components/schemas/Post"}}}}}}}},"components":{"schemas":{"Post":{"type":"object","required":["id","userId","title","body"],"properties":{"id":{"type":"integer"},"userId":{"type":"integer"},"title":{"type":"string"},"body":{"type":"string"}}}}}}",
+    "type": "openapi",
+  },
+  "originUrl": "https://jsonplaceholder.typicode.com",
+  "pricingIntervals": [
+    "month",
+  ],
+  "pricingPlans": [
+    {
+      "lineItems": [
+        {
+          "amount": 0,
+          "slug": "base",
+          "usageType": "licensed",
+        },
+      ],
+      "name": "Free",
+      "slug": "free",
+    },
+  ],
+  "toolConfigs": [],
+  "version": undefined,
+}
+`;
+
 exports[`loadAgenticConfig > basic-raw-free-json 1`] = `
 {
   "name": "test-basic-raw-free-json",
diff --git a/packages/platform/src/load-agentic-config.test.ts b/packages/platform/src/load-agentic-config.test.ts
index 81c86ac0..cc8e8133 100644
--- a/packages/platform/src/load-agentic-config.test.ts
+++ b/packages/platform/src/load-agentic-config.test.ts
@@ -12,7 +12,8 @@ const fixtures = [
   'pricing-pay-as-you-go',
   'pricing-3-plans',
   'pricing-monthly-annual',
-  'pricing-custom-0'
+  'pricing-custom-0',
+  'basic-openapi'
 ]
 
 const invalidFixtures = [
diff --git a/packages/platform/src/load-agentic-config.ts b/packages/platform/src/load-agentic-config.ts
index 480c08f3..7e247a8f 100644
--- a/packages/platform/src/load-agentic-config.ts
+++ b/packages/platform/src/load-agentic-config.ts
@@ -18,5 +18,5 @@ export async function loadAgenticConfig({
     ]
   })
 
-  return validateAgenticProjectConfig(config)
+  return validateAgenticProjectConfig(config, { cwd })
 }
diff --git a/packages/platform/src/origin-adapters/openapi.ts b/packages/platform/src/origin-adapters/openapi.ts
index 38b025a8..a135dda7 100644
--- a/packages/platform/src/origin-adapters/openapi.ts
+++ b/packages/platform/src/origin-adapters/openapi.ts
@@ -17,7 +17,7 @@ export async function resolveOpenAPIOriginAdapter({
 }: {
   originAdapter: OpenAPIOriginAdapterConfig
   label: string
-  cwd?: URL
+  cwd?: string
   logger?: Logger
 }): Promise<{
   originAdapter: OpenAPIOriginAdapter
diff --git a/packages/platform/src/validate-agentic-project-config.ts b/packages/platform/src/validate-agentic-project-config.ts
index b25df7b3..e03a86da 100644
--- a/packages/platform/src/validate-agentic-project-config.ts
+++ b/packages/platform/src/validate-agentic-project-config.ts
@@ -11,7 +11,7 @@ export async function validateAgenticProjectConfig(
   {
     strip = false,
     ...opts
-  }: { logger?: Logger; cwd?: URL; strip?: boolean; label?: string } = {}
+  }: { logger?: Logger; cwd?: string; strip?: boolean; label?: string } = {}
 ): Promise<AgenticProjectConfig> {
   const config = parseAgenticProjectConfig(inputConfig, {
     strip,
diff --git a/packages/platform/src/validate-origin-adapter.ts b/packages/platform/src/validate-origin-adapter.ts
index 67b8b847..6b8912de 100644
--- a/packages/platform/src/validate-origin-adapter.ts
+++ b/packages/platform/src/validate-origin-adapter.ts
@@ -22,7 +22,7 @@ export async function validateOriginAdapter({
   originAdapter: Readonly<OriginAdapterConfig>
   label: string
   version?: string
-  cwd?: URL
+  cwd?: string
   logger?: Logger
 }): Promise<OriginAdapterConfig> {
   validateOriginUrl({ originUrl, label })
diff --git a/packages/types/src/origin-adapter.ts b/packages/types/src/origin-adapter.ts
index 81096d4f..57cd98cb 100644
--- a/packages/types/src/origin-adapter.ts
+++ b/packages/types/src/origin-adapter.ts
@@ -21,7 +21,7 @@ export type OriginAdapterLocation = z.infer<typeof originAdapterLocationSchema>
 // >
 
 export const commonOriginAdapterSchema = z.object({
-  location: originAdapterLocationSchema
+  location: originAdapterLocationSchema.optional().default('external')
 
   // TODO: Add support for `internal` hosted API servers
   // internalType: originAdapterInternalTypeSchema.optional()
diff --git a/readme.md b/readme.md
index c0e394c8..17cd234c 100644
--- a/readme.md
+++ b/readme.md
@@ -52,7 +52,7 @@
   - add support for custom headers on responses
   - signed requests
 - revisit deployment identifiers so possibly be URL-friendly?
-- rename parseFaasIdentifier and move validators package into platform-types
+- rename parseFaasIdentifier and move validators package into platform-types?
 
 ## License