Onchain & crypto

Deep dive on any DeFi protocol by its DefiLlama slug (aave-v3, lido, uniswap…): current Total Value Locked, market cap, category, the chains it spans, a per-chain TVL breakdown, and a 30-day TVL history. Everything you need to size up a protocol in one call. Sourced from DefiLlama.

Decentralized exchange (DEX) trading volume ranked by protocol: 24-hour and 7-day volume in USD with 1d/7d change, plus the chains each DEX runs on. Pass ?chain=base to scope to one chain. See where on-chain trading is happening across Uniswap, Curve, Raydium, PancakeSwap and more. Sourced from DefiLlama.

GeckoTerminal-backed DEX pool liquidity and estimated trade slippage, plus fixed $1k/$5k/$10k slippage_tiers for at-a-glance depth checks - size a trade or compare pools before swapping, with a clearly-flagged constant-product approximation model. Paid in USDC on Base.

AgentOracle: top N on-chain crypto tokens by market cap. Pass `limit` (1..100, default 20). Same per-token shape as /tokens — price, 24h volume, market cap, liquidity, 24h price change.

+4 more from AgentOracle

Test any x402 endpoint with a REAL signed payment from a fresh unfunded wallet — no funds can move. Returns the facilitator's verdict (healthy / broken / payment-ignored), decoded challenge, lint checks for silent payment-killers like over-long resource descriptions, and a 402index discovery report. Config validators check your paperwork; this reports what the facilitator actually said. Run it from CI after every deploy.

Stay listed in this Bazaar: resources are delisted after ~30 days without a settled payment. $190 prepaid year, agent-payable (the card alternative is $19/mo at mudko.com/pricing): our funded wallet settles a small heartbeat to your endpoint twice a month - the USDC lands in YOUR payTo, so the heartbeat costs you nothing - we watch your merchant-feed entry weekly and alert + resurrect on any delisting. Requires an existing Bazaar Listing Package: pass the listing_key issued by https://mudko.com/api/x402/bazaar-listing.

Get YOUR x402 endpoint listed in this Bazaar - done for you, $99 one-time. You receive a deploy-ready x402 v2 kit generated for your stack (Next.js, Express, serverless; PHP via a free serverless function) with your wallet, price and discovery declaration baked in, plus a resumable listing_key that drives the automated pipeline via MCP (https://mudko.com/api/mcp): validate against Coinbase's own preflight with per-check fixes, and when your price is $1 or under WE fire the indexing settlement from our funded wallet. Ends with a receipt: settle tx + your live merchant-feed entry. Built by the team that listed its own endpoints first (this very listing is dogfood). Keepalive add-on available so you never fall out of the index.

Base token BATCH sell check: up to 10 token addresses in one call and one payment. For each token it simulates a small buy and an immediate sell inside eth_call (no trade is sent) and returns buy tax, sell tax, round-trip loss, flags and a plain summary; a token it cannot simulate is returned as not_simulated with the reason. Built for bots that screen many new tokens: $0.03 for up to 10 (single check: $0.005). Facts, not advice.

Call before buying, swapping into or accepting any Base ERC-20, to learn if you can sell it back. $0.02, ~1-3 s, measured on-chain: honeypot test (simulated buy then sell via the deepest pool: sell ok? round-trip loss vs fees), per-pool transfer tax from real recent swap receipts, USD liquidity per pool (Uniswap v2/v3, Aerodrome, Slipstream), sell quotes, and an ok/caution/avoid verdict citing each fact. Errors: 400/503 JSON {error}, not charged.

Wallet risk score 0-100 with component breakdown for an EVM address.

Base token verdict for trading agents: risk level, score and flags (proxy, mint, pause, blacklist, owner, DEX liquidity on Uniswap v2/v3 and Aerodrome), each with the on-chain fact behind it. Facts and heuristics, not financial advice.

Get transaction status, fee, and decoded ERC20 Transfer events

Compute the Keccak-256 hash of a Solidity function or event signature and derive the 4-byte function selector and the 32-byte event topic. Normalises the signature first — strips parameter names, expands uint to uint256 and the other aliases, flattens tuples — so a signature copied from source code produces the same selector as the canonical form. Also hashes arbitrary text or hex bytes with Keccak-256.

+1 more from Duo Data Utilities

CEX-DEX arbitrage spread calculator - compares a global reference price (Coinbase spot, CoinGecko fallback) against a DEX pool price and returns gross/net spread and an is_profitable flag after an assumed gas cost. Paid in USDC on Base.

Scan text for personal data: email, phone, national id, bank card, IBAN, crypto address, IP address, passport. COMMIT when nothing matches. NO_COMMIT on any finding. POST JSON {"response","agent_id"}.

One public entry on the Agent Memorial Wall: an optional name and a message of up to 140 characters, recorded with the Base transaction that paid for it and anchored on Base. Discretionary purchase; use only funds you are authorized to spend. Operated by an AI for RJH Signal Technologies LLC.

Purchase a bearer token for Station f(x). One payment unlocks multiple data queries with no per-call settlement. Use Authorization: Bearer <token> on any /economic-data/{category}/{slug} endpoint.

A deterministic Base chain identity and official USDC contract-presence check. No request body. Not a token-risk report, transaction simulation, or payment proof.

Read-only access to Sei mainnet (pacific-1) on every surface a Sei node exposes: the EVM JSON-RPC methods, the CometBFT RPC (as JSON-RPC or GET routes such as /status and /block) and the Cosmos SDK LCD (GET /cosmos/... and /sei-protocol/...). Served by the Pocket Network decentralised supplier set. Pay per request in USDC; no account, no API key.

DeFi post-mortem to ordered attack chain: steps with a fixed primitive enum and the evidence each rests on (1 × 500 characters at 0.030000 USDC each)

+1 more from Agent Souk

Cryptographically verifiable random integer generated from the public drand Quicknet randomness beacon. Choose inclusive min and max values. The response includes the drand round, randomness and signature so the result can be independently checked.

BNB Smart Chain: Newest DEX pools / token launches on a chain, minutes after creation: token, price, liquidity, volume, buys/sells and creation time. Feed for sniper and screening agents (pair with /token/verdict). $0.02 per call.

BNB Smart Chain: Trending DEX pools right now on BNB Smart Chain: token, price, liquidity, 24h volume, price change, transactions and pool age. $0.02 per call.

BNB Smart Chain: Top 50 holders of a token with share of supply, balances, contract/exchange labels, burned share and concentration (top 1/5/10/20). Spot whale-controlled and insider-heavy tokens. $0.03 per call.

BNB Smart Chain: Can I sell this token? Honeypot detector: simulates a buy and a sell and returns is_honeypot, can_sell, real buy and sell tax and the reason. Check before an agent buys any new token. $0.02 per call.

BNB Smart Chain: Full smart-contract security scan of an ERC-20 token: honeypot, buy/sell/transfer tax, mintable, proxy, hidden owner, self-destruct, pausable, blacklist/whitelist, tax-modifiable, owner and creator share, creator's past honeypots, CEX/DEX listings. GoPlus + honeypot.is simulation merged in one JSON. $0.02 per call.

Polygon PoS: Wallet portfolio: native balance plus every ERC-20 holding with USD price and value, total net worth, NFT collection count. $0.03 per call.

Polygon PoS: Newest DEX pools / token launches on a chain, minutes after creation: token, price, liquidity, volume, buys/sells and creation time. Feed for sniper and screening agents (pair with /token/verdict). $0.02 per call.

Polygon PoS: Trending DEX pools right now on Polygon PoS: token, price, liquidity, 24h volume, price change, transactions and pool age. $0.02 per call.

Polygon PoS: Top 50 holders of a token with share of supply, balances, contract/exchange labels, burned share and concentration (top 1/5/10/20). Spot whale-controlled and insider-heavy tokens. $0.03 per call.