parlel/resource-groups

A zero-dependency, in-process fake of AWS Resource Groups. Speaks the REST/JSON wire protocol used by @aws-sdk/client-resource-groups.

Property	Value
Service name	`resource-groups`
Port	`4736`
Protocol	REST/JSON
Healthcheck	`GET /_parlel/health`
Account ID	`000000000000`

Default connection

AWS_ENDPOINT_URL=http://127.0.0.1:4736
AWS_REGION=us-east-1
AWS_ACCESS_KEY_ID=parlel
AWS_SECRET_ACCESS_KEY=parlel

Supported operations

Operation	Path
CreateGroup	`POST /groups`
ListGroups	`GET /groups` (or `POST /groups/list`)
GetGroup	`GET /groups/{name}`
DeleteGroup	`DELETE /groups/{name}`
SearchResources	`POST /resources/search`
ListGroupResources	`GET /groups/{name}/resources`
Tag	`PUT /resources/{arn}/tags`
GetTags	`GET /resources/{arn}/tags`

SDK example

import {
  ResourceGroupsClient,
  CreateGroupCommand,
  GetGroupCommand,
} from "@aws-sdk/client-resource-groups";

const rg = new ResourceGroupsClient({
  region: "us-east-1",
  endpoint: "http://127.0.0.1:4736",
  credentials: { accessKeyId: "parlel", secretAccessKey: "parlel" },
});

await rg.send(
  new CreateGroupCommand({
    Name: "prod-resources",
    ResourceQuery: {
      Type: "TAG_FILTERS_1_0",
      Query: JSON.stringify({ ResourceTypeFilters: ["AWS::AllSupported"], TagFilters: [{ Key: "env", Values: ["prod"] }] }),
    },
  }),
);
const { Group } = await rg.send(new GetGroupCommand({ GroupName: "prod-resources" }));
console.log(Group.GroupArn);

Access via MCP / preview URL

When run inside parlel, Resource Groups is reachable through the pool's MCP bridge and any assigned preview URL. Point AWS_ENDPOINT_URL at the preview URL.

Surface coverage

This emulator faithfully replicates the API surface most application code and agents exercise. Anything below the supported lines is either an intentional design choice for a fast, zero-cost local emulator (✓ By design) or a candidate for a future release (⟳ Roadmap) — never a silent inaccuracy.

Legend: ✅ fully supported · ◐ accepted (stored, not strictly enforced) · ✓ by design · ⟳ on the roadmap.

Area	Limitation
SearchResources	Returns a small synthetic resource set, not real query results.
Resources	`ListGroupResources` reflects only explicitly attached ARNs.
Tagging	Tagging is supported for group ARNs only.
State	In memory, cleared on reset.

Configuration — `test.env`

Copy these into your test.env (used by the bridge sidecar flow). Tokens are Parlel's seeded test credentials — any non-empty value is accepted by the emulator, so you rarely need to change them. Swap in real credentials only when pointing at the live service in prod.env.

AWS_ACCESS_KEY_ID=parlel
AWS_SECRET_ACCESS_KEY=parlel
AWS_REGION=us-east-1
AWS_ENDPOINT_URL=http://parlel-bridge:4736