How Fastify CORS is used
Fastify CORS is a dependency in 9 of the 6,208 public GitHub projects set up for AI coding agents that we scanned, too few to describe it from them alone. Our scan also samples projects by dependency (Solana 2,661, Ethereum and EVM 1,496, 3D and games 2,818, agent frameworks and SDKs 10,983); counting those, it appears in 35 projects, and what it is used with below comes from all of them. The most used alternative in our scan is cors (196 projects). Projects that use it most often also use Fastify (97.1%), tsx (68.6%), dotenv (51.4%).
Fastify CORS popularity over time
Gid Score 45: downloads 78, use in agent projects 36, GitHub stars 0, downloads trend 61 (each 0-100). How it is calculated.
Often used with Fastify CORS
| Fastify | 97.1% of Fastify CORS projects · 402.0× more than average |
|---|---|
| tsx | 68.6% of Fastify CORS projects · 4.5× more than average |
| dotenv | 51.4% of Fastify CORS projects · 3.3× more than average |
| Zod | 62.9% of Fastify CORS projects · 2.5× more than average |
| TypeScript | 91.4% of Fastify CORS projects · 1.7× more than average |
| @fastify/static | 34.3% of Fastify CORS projects · 266.1× more than average |
| Vitest | 51.4% of Fastify CORS projects · 2.5× more than average |
| OpenAI | 28.6% of Fastify CORS projects · 6.2× more than average |
From all 35 projects in our scan that use Fastify CORS, including the dependency samples.
By coding agent
| Claude Code | 0.2% of projects set up for it |
|---|
Share of public repos configured for each agent that list Fastify CORS as a dependency.
How Fastify CORS is funded
Open Collective: Fastify
| Received, last 12 months | $11,981 Oct 2025 – Sep 2026 |
|---|---|
| Estimated annual budget | $15,492 Open Collective's estimate |
| Balance | $23,397 |
| Raised since the start | $23,585 · $188 paid out |
| Typical month median, last 12 months | $716 · $595 over 24 months |
| Last 12 months vs the 12 before | +37% |
| Contributors, last 12 months | 9 |
Top company backers all time, 7 companies in total
| Handsontable - JavaScript Data Grid | $2,700 since Jul 2024 |
|---|---|
| Val Town | $1,200 since Nov 2025 |
| OpenJS Foundation | $1,090 since Nov 2025 |
| TestMu AI (Formerly LambdaTest) | $1,000 since Sep 2025 |
| N-iX Ltd | $400 since Jul 2026 |
Nov 2023Sep 2026
Money by month. First money received in Nov 2023. The typical month is the median: one big one-off donation does not move it.
The same collective is named by 15 more tools in our catalog: Fastify, @fastify/static, @fastify/rate-limit, @fastify/cookie, Fastify Compress, @fastify/autoload and others.
USD after payment processor fees, as Open Collective reports it; fiscal host Open Source Collective. Source
GitHub Sponsors
| @fastify | 11 current sponsors |
|---|
GitHub shows how many people and companies sponsor an account, not how much they pay.
Ways to fund Fastify CORS
GitHub Sponsors Open Collective
As the maintainers list them in FUNDING.yml on GitHub. Checked Oct 20, 2026.
Install
| Package | npm install @fastify/cors |
|---|---|
| Main stacks | TypeScript / JavaScript (32), Next.js (2), Python (1) |
| Example projects | tsensei/OpenReels, DekaPrayoga/AurixAgent, Uniswap/smallocator, hexian2001/lingxiao-coding, flaviodelgrosso/fastify-mcp-server |
Alternatives to Fastify CORS
Tools that do the same job, so a project picks one or the other. Add-ons and libraries used alongside Fastify CORS are not listed here; they are in "Often used with".
| Tool | Gid Score | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|---|
| cors npm Express/Node.js middleware for handling Cross-Origin Resource Sharing. |
74 | 196 (4.1%) | 52.5M | 6,195 | MIT |
More in HTTP servers and APIs: Uvicorn FastAPI Express python-multipart Flask Hono Starlette express-rate-limit