Context7
Up-to-date docs for AI agents
Descripción del creador (original en inglés)
Search and book flights and hotels: hundreds of airlines, plus bookable hotel rates.
Estos tres nunca se combinan en una sola puntuación: las opiniones, las mediciones y la popularidad son cosas distintas.
Todavía no escribimos un resumen sencillo para este. Abajo están los datos que leímos del registro.
Elige la app de IA que usas y copia la configuración.
LETSFG_BEARER_TOKEN, LETSFG_API_KEYLos valores marcados como secretos son llaves de tu cuenta. Nunca los compartas ni los pegues en un chat.
Necesitas
¿Qué app usas?
Elige tu app arriba. La recordamos, así que la próxima vez el botón dirá “Instalar en …”.
Funciona en Claude para web, escritorio y móvil:
https://letsfg.co/developers/api/mcpAbre Claude Desktop → Settings → Developer → Edit Config y pega esto en claude_desktop_config.json
{
"mcpServers": {
"letsfg": {
"command": "npx",
"args": [
"-y",
"letsfg-mcp"
],
"env": {
"LETSFG_BEARER_TOKEN": "your-value",
"LETSFG_API_KEY": "your-value"
}
}
}
}Ejecuta esto en tu terminal
claude mcp add --transport http letsfg https://letsfg.co/developers/api/mcpclaude mcp add letsfg --env LETSFG_BEARER_TOKEN=your-value --env LETSFG_API_KEY=your-value -- npx -y letsfg-mcpCompleta los valores vacíos antes de ejecutarlo.
Pégalo en .cursor/mcp.json de tu proyecto, o en ~/.cursor/mcp.json
{
"mcpServers": {
"letsfg": {
"url": "https://letsfg.co/developers/api/mcp"
}
}
}Pégalo en .cursor/mcp.json de tu proyecto, o en ~/.cursor/mcp.json
{
"mcpServers": {
"letsfg": {
"command": "npx",
"args": [
"-y",
"letsfg-mcp"
],
"env": {
"LETSFG_BEARER_TOKEN": "your-value",
"LETSFG_API_KEY": "your-value"
}
}
}
}Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.
Pégalo en .vscode/mcp.json de tu proyecto
{
"servers": {
"letsfg": {
"type": "http",
"url": "https://letsfg.co/developers/api/mcp"
}
}
}Pégalo en .vscode/mcp.json de tu proyecto
{
"servers": {
"letsfg": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"letsfg-mcp"
],
"env": {
"LETSFG_BEARER_TOKEN": "your-value",
"LETSFG_API_KEY": "your-value"
}
}
}
}Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.
ChatGPT solo se conecta a servidores en internet:
https://letsfg.co/developers/api/mcpLos nombres de los menús pueden variar un poco según el plan y con el tiempo.
Tu elección se guarda en una cookie en este dispositivo; no necesitas cuenta.
Esta configuración se genera a partir de la ficha del creador en el registro. Si el README dice otra cosa, sigue el README.
Todavía no hemos leído la lista de herramientas de este servidor; revisamos los endpoints por turnos.
Revisamos información que cualquiera puede ver; no hemos leído el código. Las revisiones que no aplican no se cuentan. · Revisado el 6 nov 2026
El nombre en el registro se verificó con la cuenta de GitHub LetsFG, dueña del repo
Todavía no hemos leído este repo en GitHub
Todavía no hemos leído este repo en GitHub
Aún sin revisar; revisamos los endpoints por turnos
Aún sin revisar; revisamos los endpoints por turnos
Aún sin revisar; leemos la lista de herramientas cuando revisamos el endpoint
Comparado con todos los servidores activos de esta categoría en el registro. Las estrellas solo cuentan cuando quien lo publica es dueño del repo.
Superó 1 de 1 revisiones básicas aplicables. No hemos leído el código. Antes de agregar una clave o un token, revisa qué acceso pide el servidor y usa una clave que tenga solo los permisos que necesitas.
Debes completar: LETSFG_BEARER_TOKEN, LETSFG_API_KEY
Funciona de las dos formas: instálalo en tu computadora o conéctate a la versión en la nube.
El repo de GitHub cambió por última vez –, y la última versión (2026.5.77) llegó al registro hace 2 meses.
Las apps compatibles con MCP, como Claude Desktop, Claude Code, Cursor y VS Code. Se conecta por URL, así que también funcionan las apps que aceptan servidores MCP remotos, como ChatGPT en modo desarrollador.
En la misma categoría: Context7, Codebase Memory, Exa
Servidores de la misma categoría hechos por otros creadores, ordenados por estrellas.
Cómo leer una tarjeta:★ Estrellas de GitHubiTres pilares: reseñas · revisiones · usoiActualizado = fecha en que se publicó la última versión en el registroi
Up-to-date docs for AI agents
Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.
Connect AI agents to Exa for web search, content fetching, and multi-step research.
Copiado tal cual del repo del creador. PopNx MCP no lo ha revisado ni lo respalda. Se quitaron HTML, imágenes y scripts. Los enlaces llevan fuera de este sitio.
Finding a flight or hotel shouldn't mean checking 47 tabs. Or 3 hours of searching.
Or having that feeling you could've got a better deal if you'd just waited a little longer.
So we built something about it.
One total price. No tracking. No price that goes up because you looked twice.
⭐ Star the repo. Share with a friend ✈️
Every airline in the world. Real prices. One function call.
LetsFG gives your AI agent flight and hotel search and booking superpowers. Our server-side engine scans the entire world for the cheapest price. Search is free. Booking is real: the fare is held on your card, a LetsFG booking agent buys the ticket, and you get the airline's PNR.
The same flight costs $20–$50 less because you skip OTA inflation, cookie tracking, and surge pricing.
Claude: LetsFG is in Claude's connector directory: add it there, no URL to paste. Other agents: add https://letsfg.co/mcp as an MCP server. Approving the connection opens letsfg.co/connect: one tap, no card. The card is asked for at your first booking, in a 0.00 Revolut setup (nothing is charged, no Revolut account needed). That token searches for free and books. Scripts: send the same token as Authorization: Bearer to the PFS endpoints. Developer API: a separate paid product for high-volume commercial use; most agents do not need it. → Get started
We searched 5 routes on Google Flights and LetsFG on the same day (2026-08-05), for flights departing 2026-09-16. Same airline, same number of stops — LetsFG was cheaper every time:
| Route | Airline | Google Flights | LetsFG | You Save |
|---|---|---|---|---|
| LAX → Paris (CDG) | JetBlue, 1 stop | $363 | $334 | $29 |
| SFO → London (LHR) | JetBlue, 1 stop | $349 | $333 | $16 |
| LA → New York (JFK) | JetBlue, nonstop | $174 | $157 | $17 |
| London → Singapore (SIN) | Shenzhen Airlines, 1 stop | $395 | $380 | $15 |
| Chicago → Dubai (DXB) | Air Canada + Emirates, 2 stops | $517 | $461 | $56 |
$133 cheaper across 5 routes in a verified comparison (2026-08-05). LetsFG returns the same prices however often you run the search, because it doesn't track you.
Why the difference? LetsFG compares the same flight across many sellers — Skyscanner, Kayak, Momondo, plus airline websites (Ryanair, United, Southwest, EasyJet, Spirit, Norwegian, AirAsia, and more) — and shows the cheapest. No cookie tracking: the same search returns the same prices however often you run it.
Same hotel, same room type, same 2-night stay, same free-cancellation policy — checked on the same day (2026-08-05) for a 2026-09-16 check-in:
| Hotel | Booking.com | LetsFG | You Save |
|---|---|---|---|
| Hotel Boss, Warsaw | $206 | $169 | $37 |
| ibis Styles Paris Gare de l'Est | $663 | $525 | $138 |
| Copthorne Tara Hotel, London Kensington | $379 | $347 | $32 |
$207 cheaper across 3 hotels in a verified comparison (2026-08-05), matching each property's own free-cancellation rate against Booking.com's free-cancellation rate for the identical dates and room type. Prices quoted in PLN at booking, converted to USD at that day's rate.
Why the difference? LetsFG's price does not rise with demand or with who is searching, and there is no loyalty-program cross-subsidy. At booking the price is held on your card, not taken, and it is charged only once the hotel confirms. The comparison above uses free-cancellation rates on both sides; LetsFG also sells non-refundable rates, and every offer says which it is.
Human users: Use letsfg.co and search flights instantly in your browser:
Search any route, compare live results, and book the flights you want — no installation needed.
Agents / scripts (free server-side): Get a Bearer token by putting a payment method on file (nothing is charged) → use POST /api/search and POST /api/agent-book. This is PFS — Programmatic Flight Search powered by the letsfg.co engine. Search is free; the token is short-lived and refreshes itself. See letsfg.co/for-agents for the full guide.
When you're ready to integrate it into your own agent, keep reading.
| Path 1 — MCP / CLI / SDK | Path 2 — PFS (Programmatic Flight Search via letsfg.co) | Path 3 — Developer API | |
|---|---|---|---|
| Best for | AI agents (Claude, ChatGPT, Cursor, Windsurf), personal use — easiest way in | Scripts/agents calling the API directly with a Bearer token | High-volume commercial integrations that want prepaid billing. Most agents should not use this |
| Speed | 8–10 s to first results | 8–10 s to first results | 2–5 s (discover) · 8–10 s to first results (full search) |
| Search cost | Free (connect once: one tap, no card) | Free (connect once: one tap, no card) | Look-to-book: 200 free after every booking, then $0.01 |
| Booking | book_flight — fare held on your card, agent buys the ticket, real PNR | POST /api/agent-book — same flow | POST /flights/book — same flow, no booking fee |
| Setup | Add https://letsfg.co/mcp as an MCP server and approve (one tap, no card) | Same token, sent as Authorization: Bearer — see below | letsfg.co/developers |
| Runs where | Our servers (ranking local in the SDK) | Our servers | Our servers |
https://letsfg.co/mcp as an MCP server in Claude, ChatGPT, Cursor or Windsurf and approve the connection. The consent step opens letsfg.co/connect: one tap, no card. The card is asked for at the first booking (any card, or Revolut Pay / Google Pay) in a 0.00 Revolut setup: nothing is charged, no Revolut account is needed, and card details go to Revolut, never to LetsFG. The token you get back searches for free, and once the card is added the same token books. The Python and JS SDKs read that token from LETSFG_BEARER_TOKEN or ~/.letsfg/config.json and apply the open-source ranking algorithm locally. (letsfg auth runs this same connect flow from the terminal: it registers itself as an OAuth client, opens letsfg.co/connect in a browser for a person to approve, and stores the token.)POST https://letsfg.co/api/search with Authorization: Bearer → { search_id }GET https://letsfg.co/api/results/ (never counts against the rate limit)POST https://letsfg.co/api/agent-book → { booking_ref } within secondsPOST https://letsfg.co/api/agent-book/status with { booking_ref } every 20–30 s until completed (PNR), failed (hold released, nothing charged) or needs_attentionPOST /api/agent-access/request still answers 402 with add_card_url and these steps as JSON, so an agent that starts from the endpoint lands in the same place. The MPP lane (a wallet, no card) is unchanged: answer the WWW-Authenticate: Payment challenge ($0.01 once) and verify with Authorization: Payment. The Stripe setup_url / SetupIntent lanes were retired on 2026-09-02 and every token they issued was revoked; reconnect at letsfg.co/connect. Full guide and response schema: [letsfg.co/for-agents](https://letsfg
Solo se muestra el principio; lee el resto en el repo