What you get#
Onekey exposes Blockstream as 11 endpoints behind one API key: 7 endpoints return one record (data is an object) and 4 endpoints return a list (data is an array). Every answer uses the same envelope (success, data, metadata, error), the cost is reported in metadata.credits_charged, and fields are mapped onto the unified schema so the code you write for Blockstream also works for the rest of the finance & markets category.
Endpoints#
| Endpoint | What it does | Parameters | Credits | Status |
|---|---|---|---|---|
address | Address funded/spent totals and tx counts. | address* | 1 | stable |
address_txs | Latest transactions for an address (first page). | address* | 5 | stable |
block | Bitcoin block by hash. | hash* | 1 | stable |
block_txs | First page (25) of transactions in a block. | hash* | 5 | stable |
fee_estimates | Fee-rate estimates (sat/vB) by confirmation target. | - | 1 | stable |
mempool | Mempool summary (tx count, vsize, total fees). | - | 1 | stable |
mempool_recent | Most recent transactions entering the mempool. | - | 5 | stable |
recent_blocks | The 10 most recent Bitcoin blocks. | - | 5 | stable |
tip_height | Current Bitcoin chain tip height. | - | 1 | stable |
tx | Bitcoin transaction summary by txid. | txid* | 1 | stable |
tx_status | Confirmation status of a transaction. | txid* | 1 | stable |
A * marks a required parameter. Each endpoint name links to its reference page with the full parameter table, caching window and a recorded response.
Make a request#
This calls blockstream.address (1 credit, stable). Replace YOUR_API_KEY with your key; sign up, no card. 1,000 free credits cover the open-platform endpoints. Hard-to-reach platforms (X, TikTok, Instagram, Reddit, and others marked on their page) need a verified email and a purchased pack.
curl "https://api.onekey.dev/v1/blockstream/address?address=1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa" \
-H "x-api-key: YOUR_API_KEY"Fields you get back#
These unified fields come back from Blockstream, with the same names as on every other platform. The count is how many of its 11 mapped endpoints return the field; a field the source lacks is null, never missing. 25 platform-specific fields (ext.<name>) come on top, documented on each endpoint page.
| Field | Type | Endpoints |
|---|---|---|
entity.id | string | 8 |
entity.date | ISO 8601 date | 6 |
package.version | string | 3 |
The full schema is in Unified schema.
Pricing#
Blockstream calls cost 1 to 5 credits, flat per endpoint. Free when served from cache (0.2 credit for a cached response over 100 KB). Invalid, failed or not-found calls are not charged. See pricing for credit packs.