API reference · Chain & reference

OpenAPI document

The OpenAPI 3.1 contract of every REST call, public.

GET https://api.femtos.xyz/v1/openapi.json

Example

Elysium, HyperCore, HyperEVM

curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/openapi.json"

Key: Authorization: Bearer $FEMTOS_KEY. Get a free key, or with no browser through agent onboarding.

Freshness GET /v1/status Elysium, HyperCore, HyperEVM
Head and lag of each layer, measured now.
Blocks stream WS elysium.blocks · hyperevm.blocks Elysium, HyperEVM
Each new HyperEVM block header, small and big blocks, from our node.
Transaction GET /v1/tx/{hash} Elysium, HyperEVM
One transaction: status, gas, decoded transfers, swaps and liquidity, bridge legs and journey.
Elysium RPC POST /v1/elysium/rpc Elysium
Free public Elysium mainnet RPC by Femtos (chain 99901), no key, read only (no transaction sending), for wallets and dapps, not for indexing (use the Femtos API for history): per IP 5 requests a second and 60 a minute, batches of 5, eth_getLogs over 1,000 blocks at most, state of the last 128 blocks only.
Stream stats WS stats HyperCore
Our HyperCore stream health, once a second.
Check your key GET /v1/whoami Elysium, HyperCore, HyperEVM
Answers the name your key is registered under, its tier, billing state and the limits in force.