API · /across-api

Across Bridge API

healthy 4,810 Subscribers

Live cross-chain bridge data from Across, one of the largest intent-based bridges, which moves USDC, ETH, WBTC and other assets between Ethereum and its rollups (Arbitrum, Base, Optimism, Polygon, zkSync, Linea, Blast, Scroll and more) using a relayer network and a single unified liquidity pool. The quote endpoint prices a bridge transfer — the relayer capital fee, gas fee, LP fee, total fee, the amount received and the estimated fill time. The routes endpoint lists every supported bridge route (origin chain, destination chain, token). The limits endpoint returns the min and max bridgeable amount for a route. The chains endpoint lists supported chains. Read live from Across, nothing stored. This is Across's own cross-chain bridge fee, route and fill-time layer — distinct from DEX, lending, staking and price feeds.

#across #bridge #cross-chain #defi #rollups #interop #ethereum #crypto

api.oanor.com/across-api

Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/across-api/openapi.json

/api/across-api/llms.txt

Discovery: GET /api/index.json lists every API.

Across Bridge API — live data on the oanor API marketplace

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 186 ms; Server probes · 24h
Subscribers: 4,810; active
Total calls: 95; last 7 days

Full status page → · 15 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

2,400 calls / month
3 requests / second
Hard cap (429 above quota, no overage)
2.4k calls/month
3 req/sec
All routes
No credit card

Starter

€9.50 /month

62,000 calls / month
15 requests / second
Hard cap (429 above quota, no overage)
62k calls/month
15 req/sec
Email support

Pro

€27.50 /month

330,000 calls / month
40 requests / second
Hard cap (429 above quota, no overage)
330k calls/month
40 req/sec
Priority support

Scale

€63.00 /month

2,050,000 calls / month
120 requests / second
Hard cap (429 above quota, no overage)
2.05M calls/month
120 req/sec
Dedicated SLA

Built by

PremiumApi

Related APIs

Other APIs with overlapping tags.

Wormhole Cross-Chain API

Cross-chain messaging and bridging activity across the Wormhole network — one of crypto's largest interoperability protocols, carrying messages and bridged value between 30+ blockchains (Ethereum, Solana, the major L2s, BNB Chain, Sui, Aptos and more) — live from the public Wormholescan API, no key. Over its life Wormhole has relayed well over a billion messages; cross-chain volume is a core health metric of the multi-chain economy: how much value is actually moving between ecosystems, which chains are the busiest source of that flow, and which assets are being bridged. The stats endpoint is the global scorecard: total messages ever relayed, total bridged volume and the value locked, plus message counts and volume over the last 24 hours, 7, 30, 90 days and a year. The chains endpoint ranks the blockchains by their cross-chain transfer activity over the last day — the number of transfers leaving each chain and the dollar volume — so you can see which ecosystems are the busiest exporters of value. The assets endpoint ranks the tokens being bridged the most by dollar volume. This is the cross-chain messaging / bridge-flow cut — distinct from single-bridge feeds (Across, THORChain), the DeFi-TVL and DEX feeds, and the on-chain and price feeds. Volumes and value locked are in US dollars; everything is live. Built for crypto cross-chain analytics, bridge monitoring and multi-chain dashboards.

api.oanor.com/wormhole-api

Wheatstone Bridge API

Wheatstone-bridge and strain-gauge maths as an API, computed locally and deterministically. The bridge endpoint takes the four arm resistances R1–R4 and an excitation voltage and returns the bridge output voltage between the two midpoints, Vout = Vin·(R2/(R1+R2) − R4/(R3+R4)), in volts and millivolts, the voltage at each midpoint, and whether the bridge is balanced (Vout = 0 when R1·R4 = R2·R3). The balance endpoint inverts it: give any three arms and it solves the fourth resistance that balances the bridge, the classic way a Wheatstone bridge measures an unknown resistance. The strain endpoint models a strain-gauge bridge — quarter, half or full — and converts in both directions between mechanical strain and electrical output: from a gauge factor and a strain (given directly, as microstrain or as a relative resistance change ΔR/R = GF·ε) it returns the output ratio and voltage Vout/Vin = (k/4)·GF·ε where k is the number of active arms, and from an output voltage and excitation it returns the strain and microstrain. Everything is computed locally and deterministically, so it is instant and private. Ideal for instrumentation and sensor tools, load-cell, pressure-sensor and RTD measurement design, strain-gauge and data-acquisition apps, and electronics education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is bridge and strain-gauge measurement; for Ohm's law, voltage dividers and series/parallel resistor combinations use an Ohm's-law API.

api.oanor.com/wheatstone-api

Sifchain API

Live on-chain data for Sifchain (chain id sifchain-1) — the Cosmos-SDK Layer-1 omni-chain decentralised exchange, whose native token is ROWAN — served directly from public LCD/REST nodes with multi-node failover. The status endpoint returns the latest block height and time, chain id, the staking bond denom and the current minting inflation rate. The validators endpoint lists the active bonded validator set ranked by stake, each with its moniker, operator address, self-plus-delegated ROWAN, commission rate and jailed flag. The supply endpoint returns the total ROWAN supply, the amount bonded in staking and the resulting bonded ratio. The governance endpoint returns the most recent on-chain proposals with their id, title, status and voting window. ROWAN uses an 18-decimal base denomination which is converted to whole ROWAN with exact big-integer scaling, and every figure is read live from the chain — nothing bundled or modelled — behind a short server-side cache with keep-warm so the feed stays fast and fresh. Ideal for staking dashboards, validator and delegator tooling, explorers, governance trackers and portfolio or analytics apps across the Cosmos and cross-chain DEX ecosystem. Live keyless upstream. 5 endpoints.

api.oanor.com/sifchain-api

Maya Protocol Cross-Chain DEX API

Live data from MAYAChain, the THORChain-derived cross-chain decentralized exchange (native asset CACAO) that swaps native BTC, ETH, ARB, ADA and more without wrapping or KYC. Read every liquidity pool (asset, USD price, asset & CACAO depth, 24h volume, pool APY, savers APR, status); the full detail of a single pool by asset; the global DEX stats (CACAO price, swap count and volume, active users, liquidity added); the network and node stats (active node count, bonding & liquidity APY, total reserve); and the most recent on-chain actions (swaps, adds, withdraws). The Maya / cross-chain-DEX / liquidity layer for DeFi dashboards, swap routers and yield trackers.

api.oanor.com/maya-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Across Bridge API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Across Bridge API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for Across Bridge API?

Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.

How much does Across Bridge API cost?

Across Bridge API has a free tier with 100 calls / month. Paid plans start at €9.50 / month with higher quotas and faster rate limits.

Can I cancel my subscription anytime?

Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.

Is Across Bridge API GDPR-compliant?

All requests to Across Bridge API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Quote 1

Routes 1

Limits 1

Chains 1

Meta 1

Pick an endpoint from the list on the left to see its details and try it.

GET /v1/quote

Price a bridge transfer — fees, output, fill time

Playground

Parameters

Custom headers

Language: Client:

GET /v1/routes

Supported bridge routes

Playground

Parameters

Custom headers

Language: Client:

GET /v1/limits

Min/max bridgeable amount for a route

Playground

Parameters

Custom headers

Language: Client:

GET /v1/chains

All supported chains

Playground

Custom headers

Language: Client:

GET /v1/meta

Service metadata

Playground

Custom headers

Language: Client:

Code snippets

curl https://api.oanor.com/across-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/across-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/across-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);

import requests
r = requests.get(
    "https://api.oanor.com/across-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

Ratings

No reviews yet.

Discussion

Ask questions, share usage tips, get answers from the provider and other developers. Public — anyone can read.

New thread

📌 Pinned 🔒 Locked

· ·

🔒 This thread is locked — no new replies.

No threads yet — start the discussion.

Support

Private 1:1 support with the provider — billing questions, integration issues, account problems. Only you and the provider team can see these threads.

Open new ticket

Describe what you need help with. The provider team gets an email and replies on the ticket page.

No tickets yet for this API.

Subscription active — calls can start immediately.

Send your first request —

Subscription active — copy a snippet and fire off your first call.

Pick a key

Plaintext is shown once at creation — use the prefix as a reminder.

Across Bridge API

API health

Pricing

Built by

Related APIs

Wormhole Cross-Chain API

Wheatstone Bridge API

Sifchain API

Maya Protocol Cross-Chain DEX API

Frequently asked questions

Parameters

Parameters

Parameters

Code snippets

Ratings

Discussion

New thread

📌 🔒

Support

Open new ticket

Your cookie choices