hatchable

Build and host full-stack web apps and sites on Hatchable from any MCP client.

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What it can do

  • Create Project: Create a new Hatchable project. This generates a URL slug, creates a dedicated PostgreSQL database, and returns the project ID and URLs. Call this first before writing files or creatin
  • Get Project: Get project details including slug, visibility, status, deployed functions, and the database schema (tables, columns, types).
  • List Projects: List all projects you own or collaborate on, with their visibility, tier, role, and current version.

What data it sees

Do you need an account

No: the server works without sign-in

Build and host full-stack web apps and sites on Hatchable from any MCP client. DB, auth, storage, domains, and cron per project. Free tier.

How to connect

How to connect hatchable to Claude

The server address to paste into Claude settings:

https://hatchable--hatchable.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect hatchable to ChatGPT

The server address to paste into ChatGPT settings:

https://hatchable--hatchable.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect hatchable to Cursor

The server address to paste into Cursor settings:

https://hatchable--hatchable.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (33)

Raw names from tools/list. Only developers need these.

create_projectCreate a new Hatchable project. This generates a URL slug, creates a dedicated PostgreSQL database, and returns the project ID and URLs. Call this first before writing files or creating tables. ## Project structure ``` public/ static files, served at their file path api/ backend functions — each file is one endpoint hello.js → /api/hello users/list.js → /api/users/list users/[id].js → /api/users/:id (req.params.id — one segment) docs/[...path].js → /api/docs/*path (req.params.path — string[], catches multi-segment) _lib/ shared code, not routed migrations/*.sql SQL files, run in filename order on every deploy seed.sql optional — runs on first deploy / fork, once per project hatchable.toml optional overrides (cron, auth, project name) package.json dependencies (no build scripts yet — build locally, commit public/) ``` ### Routing precedence Most-specific wins. For a request to `/api/users/42`: 1. `api/users/42.js` (static) — beats 2. `api/users/[id].js` (single-param, `params.id = "42"`) — beats 3. `api/users/[...rest].js` (catch-all, `params.rest = ["42"]`) Catch-all params arrive as `string[]`, never slash-joined. Use `req.params.path` as an array: `const [first, ...rest] = req.params.path;` ### Static file resolution (public/) A request to `/foo/bar/baz` tries, in order: 1. `public/foo/bar/baz` (exact file) 2. `public/foo/bar/baz.html` 3. `public/foo/bar/baz/index.html` 4. Ancestor `index.html` fallback — walks up: `public/foo/bar/index.html` → `public/foo/index.html` → `public/index.html` Step 4 means each folder with an `index.html` acts as its own mini-site. You can ship an `/admin/*` React SPA alongside a static marketing page at `/` — unmatched paths under `/admin/` fall back to `public/admin/index.html`, not the root one. ## Handler contract Every file under api/ exports a default async function: ```js // api/users/list.js import {
get_projectGet project details including slug, visibility, status, deployed functions, and the database schema (tables, columns, types).
list_projectsList all projects you own or collaborate on, with their visibility, tier, role, and current version.
deployDeploy the project. Runs migrations/*.sql (tracked so each runs once), runs seed.sql on first deploy, copies public/ files to the CDN, and registers api/ files as live endpoints. Increments the project version. Call this after writing all your files. To verify your functions work after deploying, use `run_function` — it calls the function directly through your authenticated session and works for all project visibilities. The `url` field is the public URL for end users — personal projects require visitors to sign up before they can view the site.
write_fileWrite or overwrite a project file. Paths are relative to the project root. Valid locations: public/** static files (HTML, CSS, JS, images, etc.) api/**.js backend functions (each file is one endpoint) api/_lib/** shared helpers imported by api/ files, not routed migrations/*.sql database migrations, run in filename order seed.sql optional seed data, runs once on fresh installs hatchable.toml optional config overrides package.json dependencies (no build script yet) Files are stored but not live until you call `deploy`.
write_filesWrite multiple project files in a single call. Same rules as write_file but batched — faster for scaffolding a new project or updating several files at once. Each entry in the files array has a path and content. All files are written atomically — if any path is invalid, none are written.
read_fileRead the content of a project file. Pass offset/limit to read a range of lines — useful for large files where the whole file would blow the context window. When either is set, the response includes cat -n style line-numbered content so subsequent patch_file calls can reference exact line numbers.
grepRegex content search across a project's files. Postgres-backed, scoped to one project, with glob filtering. Three output modes: - files_with_matches (default) — list paths containing a match - content — matching lines with optional context and line numbers - count — per-file match counts + total Default head_limit is 250 to prevent context blowups on broad patterns. Use glob to narrow by path (e.g. 'api/**/*.js', 'public/**/*.html'). Regex uses Postgres syntax (~ / ~*). Invalid or catastrophic patterns error out via a 2s statement timeout — simplify the pattern if that happens.
list_filesList all files in a project with their paths, sizes, and hashes.
patch_fileApply a targeted edit to an existing project file without rewriting the entire file. Finds the first occurrence of `old_string` and replaces it with `new_string`. Use this instead of write_file when modifying large files (e.g. HTML) — you only send the changed portion, not the whole file. The old_string must match exactly (including whitespace). If it's not found, the tool returns an error. To insert at a specific position, use a nearby string as old_string and include it in new_string with your addition.
delete_fileDelete a project file. Takes effect after the next deploy.
execute_sqlRun SQL against the project's dedicated PostgreSQL database. Supports: CREATE TABLE, ALTER TABLE, DROP TABLE, INSERT, SELECT, UPDATE, DELETE. Use parameterized queries for safety: pass values in the `params` array with $1, $2, etc. placeholders. Return format: - SELECT: { rows: [...], count: N } — DECIMAL columns return as strings (e.g. "45.00") - INSERT/UPDATE/DELETE: { changes: N } - DDL: { changes: 0 }
get_schemaReturn the database schema for the project's PostgreSQL database: tables, columns (with types), and indexes.
set_envSet environment variables for a project. Available in functions via process.env.KEY. Keys containing SECRET, PASSWORD, TOKEN, API_KEY, or PRIVATE are automatically marked as secrets.
set_visibilityChange a project's visibility. - personal: you + invitees, login-gated, free - public: on the open web, requires Public plan ($12/mo). No app-level auth. - app: on the open web + user signups, requires App plan ($39/mo). Required if [auth] is enabled.
run_functionExecute a deployed function and return the real response. Use this to test your API endpoints. Returns: { status, headers, body, logs, error, duration_ms } Example: run_function({ project_id: 1, path: "/api/users", method: "GET" }) Example: run_function({ project_id: 1, path: "/api/users", method: "POST", body: { name: "Alice" } }) IMPORTANT: Always run_function on your API endpoints after writing them. Inspect the response body field names and types. Then write your frontend to match those exact names.
view_logsView function execution logs with rich filtering. Each entry includes status_code, duration_ms, log_output (captured console.log), error (if any), and a derived `level` field (error/warning/info). Filter by any combination of function_name, route, method, status_code (exact or 4xx/5xx wildcards), level, time range (since/until — ISO or relative like '1h'/'30m'/'7d'), full-text query across log_output and error, or specific request_id. Use this to debug production issues: e.g. `level='error'` + `since='1h'` finds everything that blew up in the last hour.
list_deploymentsList deployments for a project in reverse-chronological order. Each entry includes version, status, deployed_at, description, and summary counts (files, functions). Use this to understand recent deploy history, identify a known-good version for rollback, or debug a regression by comparing two versions.
list_functionsList every deployed API function for a project: route, method, runtime tier, cron schedule (if any), and 24-hour invocation and error counts. This is the 'what routes did I ship' introspection tool. Call it after a fork, after picking up an unfamiliar project, or to verify a deploy registered the endpoints you expected. Much cheaper than reading every api/ file with read_file.
get_deploymentDetail view of one deployment by version number — returns the full file manifest (paths, hashes, sizes) and function list captured when that version shipped. Use it with list_deployments to audit or compare what changed between versions.
list_cron_jobsList every scheduled (cron) function in a project with its cron expression, 7-day run count, error count, and last_run_at timestamp. Use this to verify a cron job is actually firing without tailing logs manually.
list_envList environment variable keys for a project. Only key names and an is_secret flag are returned — values are never exposed through this tool. Use process.env.KEY inside a deployed function to read the actual value.
delete_envDelete one or more environment variables by key. Pass `key` for a single delete or `keys` for a batch. Missing keys are reported in `skipped`, not errored, so retries are idempotent. Takes effect on the next deploy.
update_projectUpdate project metadata: name, tagline, description, category. Only the fields you pass are touched. For visibility changes use set_visibility; slug and tier are immutable.
import_file_from_urlFetch a remote URL and save the response body as a project file — server-side, so the bytes never pass through your context window. Useful for seed data, vendor libs, and asset migration. Capped at 10 MB and 10s timeout. Private/loopback addresses are rejected. Path must live under public/, api/, or migrations/, or be one of seed.sql / hatchable.toml / package.json.
search_documentationSearch Hatchable's own documentation for platform behavior — routing, the SDK surface, deploy semantics, auth config, runtime limits. Call this instead of guessing when you're unsure how a Hatchable feature works. Ranks results by term frequency across headed sections. Returns source file, section heading, and a snippet around the hit.
dry_run_deployRun every deploy-time validator against the project's current files without actually deploying. Returns `errors` (hard gates) and `warnings` (soft lints), plus a `would_deploy` summary of what would ship. Errors catch: package.json build scripts, reserved table names in migrations, auth route collisions, usage cap breaches. Warnings catch known runtime footguns that type-check but silently misbehave — most notably `auth.getUser()` / `auth.getSession()` / `db.query()` calls without `await` (returning a Promise is truthy, so `if (!user)` guards pass and downstream `user.id` is undefined). Safer than calling deploy blindly and finding out mid-flight.
upload_fileMultipart file upload for content that exceeds a single model response's output token cap (big SPA bundles, large seed data, inline vendor libs). Flow: first call with chunk_index=0 and NO upload_id — response returns an upload_id. Subsequent calls pass that upload_id with chunk_index=1, 2, 3…. Last call sets final=true to atomically concatenate and commit as one ProjectFile. Chunks are staged in Redis with a 10-minute TTL. chunk_index overwrites (safe to retry). Max chunk size: 64 KB. Max assembled file: 20 MB.
list_pending_uploadsShow multipart uploads currently staged for this project that haven't yet been committed. Use this to recover from a disconnect — find the upload_id and resume from the next chunk_index. Uploads expire 10 minutes after the last chunk was added.
run_codeExecute arbitrary JS in the project's isolate runtime with the same bindings a deployed function gets: `db`, `auth`, `email`, `storage` from "hatchable", plus process.env and global fetch. The return value of the snippet becomes the `result` field. Use this as a REPL: probe the database, verify a computation, test an API shape before committing it to a file. Nothing is persisted — the snippet runs once and disappears. Caps: 5s default timeout (max 30s), 256 KB max source length. Example: run_code({ project_id, code: ` const { db } = await import("hatchable"); const { rows } = await db.query("SELECT count(*) FROM users"); return rows[0]; `})
fork_projectFork a public project into your account. Copies all code and database schema (no data). The fork starts as a personal project you can modify freely. This is the recommended way to start from an existing app: fork it, then modify the code.
search_projectsSearch the public Hatchable project directory — other people's projects that you can view or fork. Use this to find existing apps to fork-and-modify as a starting point. Note: this searches the public *marketplace*. To search inside your own project's files, use the `grep` tool instead.
setup_accountAssociate an email and handle with your account. Step 1: Call with just email — sends a 6-digit verification code. Step 2: Call with email + code + handle — verifies and completes setup. This lets you log in to the console and sets your permanent @handle.