Crypto Markets
Perp funding and open interest
Read funding rates and open interest for a perpetual across venues. Priced per snapshot.
Spot price
$0.0030per snapshot
call-weighted across 52 of 57 priced endpoints
- Spread
- 126×
- cheapest to dearest
- Providers
- 40
- 45 hosts
- Endpoints
- 57
- 43 answered last probe
Where the offers sitLog scale. The shaded band is the middle half of the market, $0.0030 to $0.010.
$0.0010$0.126
Every supplier below carries its index against that rate: 100 is spot, 40 is 60% below it, 310 is 3.1× it. Spot is weighted by how often each endpoint is called, so one wallet listing forty near-identical endpoints cannot move it on listings alone. The cheapest offer here is $0.0010 and the dearest $0.126.
Canonical request
| symbol | string | Perpetual symbol. |
| venue? | string | Exchange to read, or all where the provider supports it. |
Canonical response
| symbol | string | The perpetual. |
| venues | object[] | One entry per exchange. |
| venues[].venue | string | Exchange name. |
| venues[].funding_rate | number | Current funding rate. |
| venues[].open_interest_usd? | number | Open interest in USD. |
| as_of | string | ISO 8601 observation time. |
135 endpoints offering this capability, from 40 wallets
| Endpoint | Index | Last called | |||||
|---|---|---|---|---|---|---|---|
 Perp open interest | agent402.tools/api/perp-open-interest | $0.0010 | 33 | 4 | 1 | Live | 1d ago |
agentdatum.com 0xCd26…7902probable | agentdatum.com/api/v1/market/indicators | $0.0010 | 33 | 2 | 2 | Live | 20d ago |
Funding Rate Annualize | api.delx.ai/api/v1/x402/funding-annualize | $0.0010 | 33 | 1 | 1 | Live | 43d ago |
Kronos BTC Funding Rate | api.nexismvp.com/market/funding | $0.0010 | 33 | 1 | 1 | Live | 9d ago |
ApiToll Perps (Hyperliquid) | crypto.apitoll.cloud/v1/crypto/perps | $0.0010 | 33 | 13 | 4 | Live | 8d ago |
openinterest.hergertsynthora.com 0x1080…7dE0probable | openinterest.hergertsynthora.com/service | $0.0010 | 33 | 7 | 5 | Live | 59d ago |
perps.hergertsynthora.com 0x1080…7dE0probable | perps.hergertsynthora.com/service | $0.0010 | 33 | 9 | 4 | Live | 58d ago |
 signals.edge.report | signals.edge.report/v1/signals/funding | $0.0010 | 33 | 2 | 2 | Live | 15d ago |
x402-data-api.sigrunner.workers.dev | x402-data-api.sigrunner.workers.dev/crypto/funding | $0.0010 | 33 | 1 | 1 | Live | 26d ago |
 Otto AI | x402.ottoai.services/funding-rates | $0.0010 | 33 | 48 | 40 | Live | today |
Otto AI 0x5bB4…9F68probable | x402.ottoai.services/hyperliquid-market | $0.0010 | 33 | 157 | 73 | Live | today |
2s 0x2b6D…32C5probable | 2s.io/api/research/funding | $0.0018 | 60 | 1 | 1 | Live | 98d ago |
Perp funding rate and history | agent402.tools/api/perp-funding | $0.0020 | 66 | 726 | 4 | Live | today |
Perp funding screener 0xaBF4…a9D0probable | agent402.tools/api/perp-funding-screener | $0.0020 | 66 | 5 | 1 | Live | 1d ago |
crypto.openverbs.com 0xb3f4…194Aprobable | crypto.openverbs.com/v1/derivatives | $0.0020 | 66 | 3 | 1 | Live | 4d ago |
 HALOWERK marktwerk 0x2880…4E5Eprobable | markt.halowerk.com/funding | $0.0020 | 66 | 1 | 1 | Live | 4d ago |
Funding Rate API | orbisapi.com/proxy/funding-rate-api-f2559c/rates/now | $0.0020 | 66 | 0 | 0 | Offline | — |
Funding Rate API | orbisapi.com/proxy/funding-rate-api-f2559c/v1/rates/now | $0.0020 | 66 | 0 | 0 | Offline | — |
 CryptoDataNode | oussapi.duckdns.org/api/v1/funding/:symbol | $0.0020 | 66 | 1 | 1 | Offline | 84d ago |
 StatePulse API | statepulse-api.hahavoid0.workers.dev/blockchain/funding-rates | $0.0020 | 66 | 2 | 1 | Live | 84d ago |
Vibe Springs 0x38C0…44C8probable | vibesprings.net/api/market-data | $0.0020 | 66 | 2 | 2 | Live | 18d ago |
AgentFeed 0x22DB…76e6probable | x402.ochinimus.app/api/funding-rate | $0.0020 | 66 | 1 | 1 | Live | 72d ago |
aniccanomac-mini-1.tail7a0ba4.ts.net:10000 | aniccanomac-mini-1.tail7a0ba4.ts.net:10000/funding-rates | $0.0030 | 99 | 1 | 1 | Offline | 68d ago |
 SolEnrich 0x8EdE…607cprobable | api.solenrich.com/entrypoints/query/invoke | $0.0030 | 99 | 4 | 1 | Live | today |
Usenami 0x1538…475cprobable | api.usenami.io/v1/perp/arbitrage/funding | $0.0030 | 99 | 3 | 3 | Live | 15d ago |
Reading this table
- Price is what the catalog carries for one unit, per snapshot. It is a published figure, not a quote — read the live 402 before paying.
- Index is that price against the spot rate, so it moves only with price — there is no separate sort for it, because ordering by index and ordering by price are the same ordering.
- 30d calls and payers are the upstream catalog’s own counters for that endpoint, so they measure demand, not quality.
- Status is the last liveness probe. There is no latency or uptime column yet: a single probe outcome cannot support one, and inventing a percentage from it would be worse than leaving it out.
- Settled volume per endpoint is also absent, and cannot be derived — a settlement carries the payee wallet, not the endpoint that was called, so a wallet serving forty endpoints cannot be split between them. The provider wallet’s own record is one click away on each row.
- The canonical response above is the shape Roundhouse maps each provider onto. Field mappings per provider are not published yet; today the contract is the target, not a guarantee about any one endpoint’s payload.
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will pick the best provider of this capability over the free read API. No key, no account.
GET roundhouseai.io/unified.json?capability=derivatives-snapshot
Show the promptHide the prompt
Using Roundhouse, compare every x402 provider of Perp funding and open interest and pick one for me. Weigh the price per unit against whether the endpoint answered when last probed, and say what the cheapest option would cost against the median. curl -s 'https://roundhouseai.io/unified.json?capability=derivatives-snapshot' The canonical request and response in that document are the shape every provider is mapped onto. Before paying, check the provider's record and read the live 402: curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet on the offer you choose>' The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.