Introduction
Farbeam is an on-chain data service. One Node process polls seven chains, stores large transfers in SQLite and serves the results as a public REST API at https://farbeamlabs.com/api/v1. The site you are reading calls the same API.
The product launched in this form on 2026-11-04 UTC. Treat it as early: the data is real, the limits are published, and the coverage is narrow on purpose.
#What you can do today
| Capability | Status | Where to start |
|---|---|---|
| Read chain heads, fees and recent blocks on seven chains | Live | List chains, Gas and fees |
| Query stored transfers of at least $100,000 | Live | List large transfers |
| Receive new transfers over Server-Sent Events | Live | Streaming guide |
| Read wallet balances for curated tokens | Live | Wallet data |
| Fetch a token report with public checks | Live | Token checks |
| Decode one transaction | Live | Transaction lookup |
| Write alert rules and receive signed webhooks | Early access | Alerts overview |
| Read chain TVL, stablecoin supply, DEX volume, trending pools | Live | Market data |
#Coverage in one table
| Chain | Head and fees | Large-transfer index | Native asset indexed |
|---|---|---|---|
| Ethereum | Yes | Yes, curated tokens | Yes, top-level ETH value |
| Base | Yes | Yes, curated tokens | No |
| BNB Chain | Yes | Yes, curated tokens | No |
| Arbitrum One | Yes | Yes, curated tokens | No |
| OP Mainnet | Yes | No | No |
| Polygon PoS | Yes | No | No |
| Solana | Yes | Sampled: one finalized block per poll, plus 7 exchange wallets | Yes, sampled |
Read chain coverage for the full matrix and sampling for what the Solana rows mean.
#Design rules
- Data only. Farbeam publishes data and methods. It does not rank tokens as good or bad, and it has no composite risk score.
- Unknown is not a pass. When a source does not return a field, the matching check reads
unknown. See token checks. - Limits are visible. The API returns
min_stored_usdandretention_dayswith each transfer page, and the docs list what each poller misses. - No private data path. Each table on the site calls the same public endpoints you can call.
#What it does not do
Farbeam does not follow every token. The index reads a curated list of 3 to 5 tokens per chain. A transfer below $100,000 is not stored. Rows older than 7 days are deleted. Labels come from a small hand-curated set, and there is no clustering.
#Where to go next
- Follow the quickstart to make a call and receive a webhook.
- Read authentication and rate limits before you ship a client.
- Read transfers vs trades before you draw conclusions from a transfer row.
Questions and data problems go to contact@farbeamlabs.com or @FarbeamX. Include the request_id from the response when you can.