Discover / chain.openverbs.com

Contract bytecode and code hash

■ Challenge detected

Fetch deployed EVM contract runtime bytecode and its Keccak-256 code hash to fingerprint or compare contracts, or feed a disassembler. Supports Ethereum, Base, Arbitrum, Optimism and Polygon, with optional historical block reads. Returns full hex code, byte size and isContract; an empty-code address returns 0x and a null hash. Key-free RPC with endpoint fallback; code capped at 256 KiB.

x402
Base
USDC

Listed price: $0.006
Challenge detected: 9 of the last 9 checks
Median response: 178 ms
Last checked: 16 Oct, 13:59 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://chain.openverbs.com/v1/bytecode
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

27 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://chain.openverbs.com/v1

POST/block$0.001Live block summary by number, hex, or tag (latest/earliest/pending/safe/finalized; default latest): number, hash, parent, timestamp (unix + ISO), transaction count, gas used/limit, base fee and miner. Reads live on-chain data with automatic endpoint fallback.
POST/token-balance$0.002Live ERC-20 token balance held by a wallet: calls `balanceOf(address)` on the token contract and returns the raw balance plus a decimal-formatted amount (using the token's own decimals) with its symbol. Distinct from `address` (native ETH balance) and `token` (contract metadata). Reads live on-chain data with automatic endpoint fallback.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 2 of 27 listed endpoints. First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/chain.openverbs.com

Recent checks

30 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 13:59 UTC	Challenge detected	402	169ms
15 Oct, 04:47 UTC	Challenge detected	402	174ms
13 Oct, 20:45 UTC	Challenge detected	402	323ms
11 Oct, 12:57 UTC	Challenge detected	402	202ms
10 Oct, 00:46 UTC	Challenge detected	402	178ms
8 Oct, 21:32 UTC	Challenge detected	402	181ms
7 Oct, 21:31 UTC	Challenge detected	402	191ms
6 Oct, 18:37 UTC	Challenge detected	402	175ms
30 Sept, 17:04 UTC	Challenge detected	402	173ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 13:59 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Contract bytecode and code hash?

Its listed price is $0.006.

What payment terms does Contract bytecode and code hash advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Contract bytecode and code hash listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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