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/api/browser/:chain/block/:hashOrHeight
GETDown

Multi-chain block lookup

Multi-chain block lookup

GET/api/browser/:chain/block/:hashOrHeight
Partial coverage. The upstream chain-data source is not reachable from our servers at the moment, so this endpoint returns 503. It stays listed so integrations do not break silently; the probe on the status page shows when it recovers.
Down. The last probe failed (HTTP 503)

Request

Query parameters

NameTypeRequiredDefaultAllowed valuesDescription
chain pathstringRequired—eth, bsc, polygon, avalanche, optimism, base, tron, sui, ton, aptos, solana, doge, ltc, bchChain id (ton has no block lookup). Example: eth
hashOrHeight pathstringRequired——Block height or hash. Example: 20000000

Parameters marked “path” are part of the URL.

Example request

curl -s "https://www.coinboss.com/api/browser/eth/block/20000000"

Response fields

The field table has not been generated for this endpoint yet. Call it in the Playground to inspect the live response.

Example response

/api/browser/eth/block/20000000 · Real response captured 2026-11-12 21:29:02 UTC. Long arrays and maps are shortened for display: data had 41 items.

  • {
    • "success": true,
    • "cached": false,
    • "chain": "eth",
    • "data": {
      • "hash": "0xd24fd73f794058a3807db926d8898c6481e902b7edb91ce0d479d6760f276183",
      • "nextBlockHash": "0x5beb18a1746bc0f84fc98648fa2a76a182eef5be01aa27be289e3e84af6b6228"
      }
    }

Details

Authentication
None. Public endpoint.
Rate limit
1200 requests per minute per IP
Server cache
30s
Edge micro-cache
10s
Update frequency
real time (30 s cache)
Window
single block
Data sources
Scraped at request time from a third-party multi-chain block explorer website (not an official public API).
Exchange coverage
eth, bsc, polygon, avalanche, optimism, base, tron, sui, ton, aptos, solana, doge, ltc, bch. Currently unavailable for all chains. TON blocks are not supported.
Units
native coin units
Timestamps
Unix epoch milliseconds (UTC) unless the field description says otherwise
Response format
json
Stability
Stable

Live status

DownChecked 2026-11-13 03:29:03 UTCHTTP 503766 msSchema not checked

The last probe failed (HTTP 503)

Availability, last 30 days

2.27% of 132 checks passed

Errors

Failed calls share one shape on every endpoint. The full list is on the errors page. Errors and rate limits →

CodeHTTPMeaningWhat to do
INVALID_PARAM400A required parameter is missing or a value is not accepted. `param` names the parameter when it is known.Do not retry unchanged; fix the request.
UNAUTHORIZED401The `CB-API-KEY` header was sent but the key is unknown or revoked. Public data needs no key — drop the header or use a valid key.Do not retry unchanged.
FORBIDDEN403The route is not part of the public API (internal or account-only).Do not retry.
NOT_FOUND404Unknown route, or the requested coin / exchange / fund does not exist.Do not retry; check the path and identifiers against the catalog.
RATE_LIMITED429More requests than the per-minute limit. `Retry-After` gives the seconds to wait.Wait for `Retry-After`, then retry with backoff.
INTERNAL500Unexpected server error. The message is generic by design; quote `request_id` when reporting it.Retry once after a few seconds; report it with the request id if it persists.
UPSTREAM_FAILED503The data source behind this endpoint did not answer in time. No stale or substitute numbers are returned in its place.Retry with backoff; check the status page.
UNAVAILABLE501 / 503The dataset is temporarily not ready (cache warming) or the endpoint has no lawful public source yet.Retry later; the catalog marks endpoints that are unavailable by design.
REQUEST_FAILED200Some older endpoints answer HTTP 200 with `success: false`. Always check `success`, not only the HTTP status.Depends on the message; treat as a failed request.

Try it

GET/api/browser/:chain/block/:hashOrHeightDown
Parameters

string — Chain id (ton has no block lookup).

string — Block height or hash.

Request URLhttps://www.coinboss.com/api/browser/eth/block/20000000
Choose an endpoint and press “Send request”. The response, headers and timing will appear here.