Frequently asked questions
Blockread is a multi-chain UTXO explorer and indexer API for BTC, BCH, LTC, and BSV. Answers below apply to the public explorer unless your deployment differs.
Where is the HTTP API documented?
Human-readable docs are at https://blockread.io/docs/. Per-chain OpenAPI (Swagger) is linked from there, including BSV at api.blockread.io/bsv/docs. Use Docs in the header.
How do I get an API key?
Open Get API key in the header to register at account.blockread.io. You can call the API without a key first (10 TPS, 1,000 calls/day).
What is the free tier?
Anonymous requests: 10 per second and 1,000 per day. Register for a key when you need more. Public plan names and limits are on the Pricing page.
Which chains are supported?
Bitcoin (BTC), Bitcoin Cash (BCH), Litecoin (LTC), and Bitcoin SV (BSV). The explorer, FAQ, docs intro, and Swagger should list the same four.
Where is pricing?
Public limits and plan names are at /pricing on this site. The account portal is for keys and billing, not the only place prices are listed.
What can I search for?
Block height, block hash, transaction id, P2PKH/P2SH address, or script hash — depending on what the indexer exposes for that chain.
How do I broadcast a transaction?
On a chain page, open Broadcast, paste raw transaction hex, and submit. Broadcasting is irreversible. Decode first if you want to inspect inputs and outputs.
How does Blockread relate to Bitails?
Blockread is the explorer, indexer, and API you query. BSV live mempool and block updates on this site use the Bitails realtime feed.
Why is some history missing?
Nodes and indexers may prune old blocks or limit proofs. Raw transaction downloads and deep history are best-effort and depend on backend retention.
How fresh is the index?
Each chain home shows live stats with a last-updated time. The Status page lists current heights for BTC, BCH, LTC, and BSV.