diff --git a/src/bluesky/atproto-resolve.controller.spec.ts b/src/bluesky/atproto-resolve.controller.spec.ts
new file mode 100644
index 00000000..9ce048c8
--- /dev/null
+++ b/src/bluesky/atproto-resolve.controller.spec.ts
@@ -0,0 +1,181 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { NotFoundException } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { AtprotoResolveController } from './atproto-resolve.controller';
+import { EventQueryService } from '../event/services/event-query.service';
+import { EventEntity } from '../event/infrastructure/persistence/relational/entities/event.entity';
+
+describe('AtprotoResolveController', () => {
+  let controller: AtprotoResolveController;
+  let eventQueryService: {
+    findByAtprotoUri: jest.Mock;
+    findBySourceAttributes: jest.Mock;
+  };
+  let configService: { get: jest.Mock };
+
+  const mockRequest = { tenantId: 'test-tenant' };
+
+  beforeEach(async () => {
+    eventQueryService = {
+      findByAtprotoUri: jest.fn().mockResolvedValue([]),
+      findBySourceAttributes: jest.fn().mockResolvedValue([]),
+    };
+
+    configService = {
+      get: jest.fn().mockReturnValue('https://platform.openmeet.net'),
+    };
+
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [AtprotoResolveController],
+      providers: [
+        {
+          provide: EventQueryService,
+          useValue: eventQueryService,
+        },
+        {
+          provide: ConfigService,
+          useValue: configService,
+        },
+      ],
+    }).compile();
+
+    controller = module.get<AtprotoResolveController>(AtprotoResolveController);
+  });
+
+  describe('resolve', () => {
+    const did = 'did:plc:abc123';
+    const collection = 'community.lexicon.calendar.event';
+    const rkey = 'abc456';
+    const expectedAtUri = `at://${did}/${collection}/${rkey}`;
+
+    it('should resolve an OpenMeet-published event by atprotoUri', async () => {
+      const mockEvent = {
+        slug: 'my-test-event',
+        atprotoUri: expectedAtUri,
+      } as unknown as EventEntity;
+
+      eventQueryService.findByAtprotoUri.mockResolvedValue([mockEvent]);
+
+      const result = await controller.resolve(
+        did,
+        collection,
+        rkey,
+        mockRequest,
+      );
+
+      expect(eventQueryService.findByAtprotoUri).toHaveBeenCalledWith(
+        expectedAtUri,
+        'test-tenant',
+      );
+      expect(result).toEqual({
+        url: 'https://platform.openmeet.net/events/my-test-event',
+        slug: 'my-test-event',
+        type: 'event',
+      });
+    });
+
+    it('should resolve a firehose-ingested event by sourceId when atprotoUri lookup fails', async () => {
+      const mockEvent = {
+        slug: 'ingested-event',
+        sourceType: 'bluesky',
+        sourceId: expectedAtUri,
+      } as unknown as EventEntity;
+
+      eventQueryService.findByAtprotoUri.mockResolvedValue([]);
+      eventQueryService.findBySourceAttributes.mockResolvedValue([mockEvent]);
+
+      const result = await controller.resolve(
+        did,
+        collection,
+        rkey,
+        mockRequest,
+      );
+
+      expect(eventQueryService.findByAtprotoUri).toHaveBeenCalledWith(
+        expectedAtUri,
+        'test-tenant',
+      );
+      expect(eventQueryService.findBySourceAttributes).toHaveBeenCalledWith(
+        expectedAtUri,
+        'bluesky',
+        'test-tenant',
+      );
+      expect(result).toEqual({
+        url: 'https://platform.openmeet.net/events/ingested-event',
+        slug: 'ingested-event',
+        type: 'event',
+      });
+    });
+
+    it('should throw NotFoundException when no event matches', async () => {
+      eventQueryService.findByAtprotoUri.mockResolvedValue([]);
+      eventQueryService.findBySourceAttributes.mockResolvedValue([]);
+
+      await expect(
+        controller.resolve(did, collection, rkey, mockRequest),
+      ).rejects.toThrow(NotFoundException);
+    });
+
+    it('should use FRONTEND_DOMAIN from config', async () => {
+      configService.get.mockReturnValue('https://custom.example.com');
+
+      const mockEvent = {
+        slug: 'some-event',
+        atprotoUri: expectedAtUri,
+      } as unknown as EventEntity;
+
+      eventQueryService.findByAtprotoUri.mockResolvedValue([mockEvent]);
+
+      const result = await controller.resolve(
+        did,
+        collection,
+        rkey,
+        mockRequest,
+      );
+
+      expect(configService.get).toHaveBeenCalledWith('app.frontendDomain', {
+        infer: true,
+      });
+      expect(result.url).toBe('https://custom.example.com/events/some-event');
+    });
+
+    it('should throw NotFoundException when FRONTEND_DOMAIN is not configured', async () => {
+      configService.get.mockReturnValue(undefined);
+
+      const mockEvent = {
+        slug: 'some-event',
+        atprotoUri: expectedAtUri,
+      } as unknown as EventEntity;
+
+      eventQueryService.findByAtprotoUri.mockResolvedValue([mockEvent]);
+
+      await expect(
+        controller.resolve(did, collection, rkey, mockRequest),
+      ).rejects.toThrow(
+        'FRONTEND_DOMAIN environment variable is not configured',
+      );
+    });
+
+    it('should throw NotFoundException for unsupported collection', async () => {
+      await expect(
+        controller.resolve(did, 'app.bsky.feed.post', rkey, mockRequest),
+      ).rejects.toThrow(NotFoundException);
+
+      expect(eventQueryService.findByAtprotoUri).not.toHaveBeenCalled();
+    });
+
+    it('should prefer atprotoUri match over sourceId match', async () => {
+      const nativeEvent = {
+        slug: 'native-event',
+        atprotoUri: expectedAtUri,
+      } as unknown as EventEntity;
+
+      eventQueryService.findByAtprotoUri.mockResolvedValue([nativeEvent]);
+
+      await controller.resolve(did, collection, rkey, mockRequest);
+
+      // Should NOT call findBySourceAttributes since atprotoUri found a match
+      expect(eventQueryService.findBySourceAttributes).not.toHaveBeenCalled();
+    });
+  });
+});
diff --git a/src/bluesky/atproto-resolve.controller.ts b/src/bluesky/atproto-resolve.controller.ts
new file mode 100644
index 00000000..bcb80172
--- /dev/null
+++ b/src/bluesky/atproto-resolve.controller.ts
@@ -0,0 +1,103 @@
+import {
+  Controller,
+  Get,
+  Inject,
+  Param,
+  Req,
+  Logger,
+  NotFoundException,
+  forwardRef,
+} from '@nestjs/common';
+import { ApiTags, ApiOperation } from '@nestjs/swagger';
+import { ConfigService } from '@nestjs/config';
+import { Throttle } from '@nestjs/throttler';
+import { Public } from '../auth/decorators/public.decorator';
+import { EventQueryService } from '../event/services/event-query.service';
+
+const SUPPORTED_COLLECTIONS = ['community.lexicon.calendar.event'];
+
+@ApiTags('ATProto')
+@Controller('atproto')
+export class AtprotoResolveController {
+  private readonly logger = new Logger(AtprotoResolveController.name);
+
+  constructor(
+    @Inject(forwardRef(() => EventQueryService))
+    private readonly eventQueryService: EventQueryService,
+    private readonly configService: ConfigService,
+  ) {}
+
+  private getFrontendDomain(): string {
+    const frontendDomain = this.configService.get<string>(
+      'app.frontendDomain',
+      { infer: true },
+    );
+    if (!frontendDomain) {
+      throw new Error('FRONTEND_DOMAIN environment variable is not configured');
+    }
+    return frontendDomain;
+  }
+
+  @Public()
+  @Throttle({ default: { limit: 30, ttl: 60000 } })
+  @Get('resolve/:did/:collection/:rkey')
+  @ApiOperation({
+    summary: 'Resolve an AT URI to an OpenMeet resource URL',
+    description:
+      'Given path params that form an AT URI (at://{did}/{collection}/{rkey}), returns the OpenMeet URL for the matching event.',
+  })
+  async resolve(
+    @Param('did') did: string,
+    @Param('collection') collection: string,
+    @Param('rkey') rkey: string,
+    @Req() req: any,
+  ) {
+    const atUri = `at://${did}/${collection}/${rkey}`;
+    const tenantId = req.tenantId;
+
+    this.logger.debug(`Resolving AT URI: ${atUri} for tenant: ${tenantId}`);
+
+    if (!SUPPORTED_COLLECTIONS.includes(collection)) {
+      throw new NotFoundException(
+        `Unsupported collection: ${collection}. Supported: ${SUPPORTED_COLLECTIONS.join(', ')}`,
+      );
+    }
+
+    // First, check for OpenMeet-published events (atprotoUri field)
+    const nativeEvents = await this.eventQueryService.findByAtprotoUri(
+      atUri,
+      tenantId,
+    );
+
+    if (nativeEvents.length > 0) {
+      const event = nativeEvents[0];
+      const frontendDomain = this.getFrontendDomain();
+      return {
+        url: `${frontendDomain}/events/${event.slug}`,
+        slug: event.slug,
+        type: 'event',
+      };
+    }
+
+    // Second, check for firehose-ingested events (sourceType='bluesky', sourceId=AT URI)
+    const ingestedEvents = await this.eventQueryService.findBySourceAttributes(
+      atUri,
+      'bluesky',
+      tenantId,
+    );
+
+    if (ingestedEvents.length > 0) {
+      const event = ingestedEvents[0];
+      const frontendDomain = this.getFrontendDomain();
+      return {
+        url: `${frontendDomain}/events/${event.slug}`,
+        slug: event.slug,
+        type: 'event',
+      };
+    }
+
+    throw new NotFoundException(
+      `No OpenMeet resource found for AT URI: ${atUri}`,
+    );
+  }
+}
diff --git a/src/bluesky/bluesky.module.ts b/src/bluesky/bluesky.module.ts
index 56840591..0d43fe6b 100644
--- a/src/bluesky/bluesky.module.ts
+++ b/src/bluesky/bluesky.module.ts
@@ -1,5 +1,6 @@
 import { Module, forwardRef } from '@nestjs/common';
 import { BlueskyController } from './bluesky.controller';
+import { AtprotoResolveController } from './atproto-resolve.controller';
 import { BlueskyService } from './bluesky.service';
 import { BlueskyIdService } from './bluesky-id.service';
 import { BlueskyIdentityService } from './bluesky-identity.service';
@@ -26,7 +27,7 @@ import { UserAtprotoIdentityModule } from '../user-atproto-identity/user-atproto
     UserAtprotoIdentityModule,
     forwardRef(() => EventModule),
   ],
-  controllers: [BlueskyController],
+  controllers: [BlueskyController, AtprotoResolveController],
   providers: [
     BlueskyService,
     BlueskyIdService,