GET /version

Returns version information for blockd and connected services. Available before blockd reaches ready state.

GET /version

Response:

{
  "blockd": {
    "version": "0.3.0-alpha.1",
    "name": "my-node"
  },
  "core": {
    "network": "signet",
    "version": 290000,
    "subversion": "/Satoshi:29.0.0/"
  },
  "indexer": {
    "version": "Fulcrum 2.0",
    "protocol": "1.4"
  }
}

Field	Description
blockd.name	Optional configurable string. See Server Configuration
core.version	Integer version format — 290000 = 29.0.0
core.subversion	Raw user agent string from bitcoind’s getnetworkinfo
core.network	Active chain, auto-detected at startup. See Network detection
indexer.version	Version string returned by Fulcrum
indexer.protocol	Protocol version returned by Fulcrum

---

GET /health/{level}

Returns server health. Available before ready state — suitable for readiness probes.

Level controls response verbosity; numeric and named aliases are equivalent.

Level	Alias	Description
0	basic	Server state only
1	tip	Adds current block tip
2	detailed	Adds bitcoind and indexer status

GET /health           # defaults to level 0 (basic)
GET /health/0
GET /health/basic
GET /health/1
GET /health/tip
GET /health/2
GET /health/detailed

For the complete health response schema, field reference, state tables, IBD fields, and ZMQ monitoring documentation, see Health & IBD Reference.