DEX spread data for any token on Base↔Arbitrum, paid per-call via x402 in USDC or USDT.
What it does
The `/v1/base/arb/dex-spread` endpoint on EruditePay's Bridge returns decentralized-exchange spread intelligence for a given token across the Base and Arbitrum networks. It accepts a POST request with a JSON body containing a `token` field (a token contract address or pair identifier) and returns spread data in JSON format. The endpoint is gated by the x402 payment protocol (v2) and costs 0.01 USDC per call on Base (network eip155:8453) or 0.01 USDT on Tron (network tron:728126428). Payment is facilitated through Coinbase CDP's x402 facilitator or directly via the EruditePay Bridge.
The provider, Erudite Intelligence LLC, operates the EruditePay x402 Bridge — a multi-chain payment facilitator supporting 20 blockchains. The Bridge itself is a FinCEN-registered MSB (BSA ID 31000324258137) and is non-custodial. The endpoint is live and returns a proper 402 challenge when called without payment. Documentation beyond the landing page and the x402 challenge schema is sparse; the `/docs` path returns a 404, and the output example in the Bazaar schema is a generic `{"success": true, "data": {}}` stub, so the exact shape of the spread data returned is not documented.
Because the output schema is underspecified, callers should expect a JSON object with a `success` boolean and a `data` object, but the specific fields within `data` (e.g., bid, ask, spread percentage, venue breakdown) are unknown from available documentation.
Capabilities
Use cases
- —Querying real-time DEX spread between Base and Arbitrum for a specific token
- —Identifying cross-chain arbitrage opportunities between Base and Arbitrum DEXes
- —Monitoring liquidity conditions across L2 networks for a given token
- —Feeding spread data into automated trading or bridging strategies
Fit
Best for
- —Crypto traders seeking cross-chain DEX spread intelligence
- —Arbitrage bots comparing prices on Base vs Arbitrum
- —DeFi analytics dashboards needing per-token spread metrics
Not for
- —Centralized exchange (CEX) spread data — this is DEX-only
- —Historical time-series spread data (no evidence of historical query support)
- —Free or high-volume bulk data retrieval (each call costs $0.01)
Quick start
curl -X POST https://bridge.eruditepay.com/v1/base/arb/dex-spread \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>" \
-d '{"token": "0x0000000000000000000000000000000000000000"}'Example
Request
{
"token": "0x0000000000000000000000000000000000000000"
}Response
{
"data": {},
"success": true
}Endpoint
Quality
The endpoint is live (402 challenge captured) with clear pricing and a defined input schema, but the output is a generic stub with no documented fields. No dedicated docs page exists (/docs returns 404), so the actual spread data structure must be discovered empirically.
Warnings
- —Output schema is a generic stub — actual response fields for spread data are undocumented.
- —The /docs path returns 404; no external documentation was found beyond the landing page.
- —The description 'Crypto data intelligence' is vague and does not specify what spread metrics are returned.
- —Arbitrum is referenced in the URL path but not explicitly mentioned in the x402 challenge or landing page copy.
Citations
- —Endpoint returns x402 v2 challenge with 0.01 USDC on Base (amount 10000, 6 decimals) or 0.01 USDT on Tronhttps://bridge.eruditepay.com/v1/base/arb/dex-spread
- —Provider is Erudite Intelligence LLC, FinCEN MSB registered (BSA ID 31000324258137)https://bridge.eruditepay.com
- —EruditePay Bridge supports 20 blockchains and charges 0.5% per settlementhttps://bridge.eruditepay.com
- —Coinbase CDP x402 facilitator is listed in the challenge extra fieldhttps://bridge.eruditepay.com/v1/base/arb/dex-spread
- —Input schema requires a token field described as 'Token address or pair identifier'https://bridge.eruditepay.com/v1/base/arb/dex-spread