cfrelay runs a Nostr relay on Cloudflare Workers and supports the basic NIP-01 protocol.
Open source
24 alternativesblastr
blastr publishes Nostr events to multiple relays through a proxy relay running on Cloudflare Workers.
About blastr
blastr is an open-source Nostr proxy relay that runs on Cloudflare Workers. It is designed to publish Nostr events to all known online relays, to help ensure events are broadcast to as many places as possible. The code is written in Rust compiled to WebAssembly and uses Cloudflare's edge network.
You can use it with compatible Nostr clients, as it works as a write-only relay for now. It also provides a POST API endpoint at /event for submitting events. Submitted events are queued and then processed in batches by a separate worker, which runs every 30 seconds when events are waiting or when a queue threshold is reached. A KV store is used to avoid rebroadcasting events that were already sent.
blastr suits developers and relay operators familiar with Cloudflare Workers, Wrangler, KV stores, and queues. Setup requires creating KV namespaces and queues and configuring deployment, so it is intended as a self-hosted repository rather than a hosted service.
Key features
- Proxy relay that publishes to all known online relays
- Compatible with Nostr clients as write-only relay
- POST API endpoint at /event for publishing
- Queues events and processes them in batches
- Uses KV store to skip already broadcast events
- Open source code under MIT license
Best for: Developers and relay operators who want to broadcast Nostr events to many relays via Cloudflare Workers.
Good for
- Open source under MIT license
- Works with existing Nostr clients
- Provides HTTP endpoint for publishing events
- Batches queued events to distribute load
Watch out for
- Write-only for now
- Requires Cloudflare KV and queues setup
- Some resource names are hardcoded and need manual configuration
blastr at a glance
- Category
- Social & Communities › Nostr
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
blastr alternatives
Tools and sites you could use instead, ranked by how closely they match.
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blastr FAQ
What is blastr?
blastr is an open-source Nostr proxy relay that runs on Cloudflare Workers and publishes events to all known online relays.
How do you publish an event with blastr?
You can use a compatible Nostr client or send to the POST API endpoint at /event. Events are queued and then broadcast in batches.
Is blastr read/write or write-only?
It is write-only for now, so it focuses on broadcasting events rather than serving them for reading.
What is needed to run blastr?
It needs Cloudflare Workers with KV namespaces and queues, deployed with Wrangler. Some resource names need manual configuration.
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