Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Added "defi_arbitrage", "opportunity_feed" and "payment_verify"; removed "dex_spread" (49 tools before, 51 now)
cross-DEX arbitrage (multichain) — Best cross-DEX/cross-chain spread for a token symbol (e.g. ETH, SOL, USDC): cheapest buy venue vs highest sell venue with gross spread %, liquidi From $0.020 USDC.
agent marketplace opportunity feed — Live marketplace gaps for a domain (e.g. crypto, security, agent, finance): unhealthy/underserved x402 categories with total vs healthy endpoin From $0.005 USDC.
payment verification (multichain) — Verify an on-chain payment: confirmations, finality, sender/receiver and value, plus optional expected-match checks (query ?to=, ?minAmount=). R From $0.010 USDC.
cross-DEX price spread — Cross-DEX price spread for a token: best bid/ask across all DEX pairs (DexScreener), spread %, liquidity-weighted mid and where the price is cheapest/deare From $0.010 USDC.
Added "defi_yields", "dex_spread", "gas_multichain" and 10 more (36 tools before, 49 now)
DeFi lending yields — Best DeFi lending/staking yields for a token symbol (e.g. USDC, ETH, SOL) across chains: top pools by APY (total + base + reward), TVL and project. Keyless, f From $0.010 USDC.
cross-DEX price spread — Cross-DEX price spread for a token: best bid/ask across all DEX pairs (DexScreener), spread %, liquidity-weighted mid and where the price is cheapest/deare From $0.010 USDC.
gas price (multichain) — Gas price for a chain (base|polygon|solana): eth_gasPrice + slow/standard/fast tiers. Solana returns the per-signature base fee. From $0.002 USDC.
NFT holdings (multichain) — NFT holdings for a wallet on Base and Polygon via the public Reservoir/Alchemy-free route: collections owned, estimated counts and floor where available From $0.010 USDC.
Added "crypto_analytics" and "crypto_prices" (34 tools before, 36 now)
Analytics snapshot for a crypto coin: realized volatility, trend direction (up/down/sideways), relative volume and position within the recent range. Optional interval (default 1h) and limit (default 168). -> /x/crypto/analytics/:symbol. Pay-per-call ($0.005 USDC).
Batch spot prices for MANY coins in ONE call: pass a comma-separated list (e.g. btc,eth,sol,doge) and get price + 24h change + quote volume for each. -> /x/crypto/prices/:symbols. Pay-per-call ($0.01 USDC).
Added "jwt_decode", "qr_generate", "sha256_fingerprint" and 4 more (27 tools before, 34 now)
Decode a JWT and extract its claims (subject, issuer, audience, expiration with expired flag, issued-at, not-before, algorithm, key id). Decode-only — signature NOT verified. -> /x/util/jwt-decode. Pay-per-call ($0.002 USDC).
Generate a QR code for any text or URL and return it as inline SVG + base64 data URI. -> /x/util/qr. Pay-per-call ($0.002 USDC).
Compute a SHA-256 fingerprint of a string: full hex, colon-separated, short 16-char id and base64. -> /x/util/fingerprint. Pay-per-call ($0.001 USDC).
Convert a value between units: length (m/km/mi/ft/in/yd/nmi + Russian verst/sazhen), mass (g/kg/lb/oz + pood/funt), area (m2/ft2/acre/hectare) and temperature (C/F/K). -> /x/util/convert. Pay-per-call ($0.001 USDC).
Added "crypto_deep", "crypto_derivatives", "crypto_indicators" and 4 more; changed the definition of "risk_check", "snapshot" and "token_report" (20 tools before, 27 now)
[Solana by default]BEFOREsending SOL/USDC topayinganyan address,run this: returns account type (wallet vs program vs closed), balance, activity, andget a 0-100 risk score with reasons and a proceed/reviewverdict.verdict,Usebuiltitfromtore-verifiableavoidon-chain
Added "account", "balance", "contract" and 9 more (8 tools before, 20 now)
[Solana by default] Native SOL balance plus every SPL token balance (incl. USDC) for a Solana address. Pay-per-call ($0.002 USDC).
Native + stablecoin balances for an address on a chosen chain. Paths: solana -> /x/solana/account/:address, base -> /x/base-fac/balance/:address, polygon -> /x/polygon-fac/balance/:address. Pay-per-call from $0.002 USDC.
Whether an address is a contract + bytecode size + ERC-20 metadata (EVM). Paths: base -> /x/base-fac/contract/:address, polygon -> /x/polygon-fac/contract/:address. Pay-per-call ($0.01 USDC).
Current gas price + estimated transfer cost. Paths: base -> /x/base-fac/gas, polygon -> /x/polygon-fac/gas. (Solana uses fixed micro-lamport fees; use health for the fee context.) Pay-per-call ($0.005 USDC).
Certificate recorded, valid to 2026-11-28
Authorization not required
Unknown → Live
First tool surface recorded: 8 tools (server version 1.0.0)
https://47620.xyz/mcp (mcp_streamable_http) — from mcp_registry, with the record
Showing the latest 11 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
payment evidence (multichain) — Given a transaction hash (EVM 0x 64-hex or Solana base58 signature), returns on-chain payment evidence: status, confirmations, sender, receiver, val From $0.010 USDC.
multichain portfolio (USD) — Unified portfolio across Solana + Base + Polygon for one address: native balance with USD value and per-chain totals. One call instead of three chain-s From $0.010 USDC.
stablecoin peg health — Peg health for a stablecoin (e.g. USDC, USDT, DAI): current USD price, peg deviation (bps), 24h/7d change, market cap and a depeg-risk band. Keyless, from D From $0.005 USDC.
token research summary — One-call research summary for a token (EVM 0x or Solana base58): price/liquidity/volume (DexScreener), market cap/rank/supply (CoinGecko), pair count, and From $0.015 USDC.
token risk score (EVM) — Static risk read for an ERC-20 on Base/Polygon: liquidity depth (DexScreener), pair count and a 0-100 risk score. From $0.010 USDC.
transaction history (multichain) — Recent transactions for an EVM address on Base and Polygon: hash, block, from/to, value, timestamp. Query: limit (default 25). From $0.010 USDC.
transaction receipt (multichain) — Normalized receipt for a transaction hash on Solana, Base or Polygon: status, block/slot, from/to, gas. Auto-detects chain by hash shape. From $0.005 USDC.
wallet balances (multichain) — Native balance for an address across Solana, Base and Polygon. Lightweight multichain balance read. From $0.005 USDC.
wallet security score (EVM) — Security/risk report for an EVM address: GoPlus address security flags (sanctioned, phishing, money laundering, mixer usage, honeypot exposure) rolled From $0.010 USDC.
Convert between unix epoch and human time: pass seconds, milliseconds or an ISO date, get epoch (s+ms), ISO-8601 UTC and a formatted value in a target timezone. -> /x/util/timestamp. Pay-per-call ($0.001 USDC).
Network and payment-asset histogram of the live x402 ecosystem: which chains (CAIP-2 ids) and which USDC/other assets the indexed pay-per-call services accept, with counts. Sourced live from public indexes. -> /x/x402/networks. Pay-per-call ($0.005 USDC).
LIVE, sourced snapshot of x402 adoption across the public ecosystem: indexed pay-per-call service count, networks, payment assets, categories and USD price stats (min/median/mean/max), each with its source URL and fetchedAt. Aggregated from 402index.io + Coinbase CDP Bazaar + PayAI Bazaar. -> /x/x402/stats. Pay-per-call ($0.01 USDC).
{"additionalProperties":false,"properties":{"address":{"description":"Solana addressAddress to check before paying (0x... EVM or base58 Solana)","type":"string"},"chain":{"description":"Chain to query","enum":["solana","base","polygon"],"type":"string"}},"required":["chain","address"],"type":"object"}
[Solana by default]Whole-network picture in ONE call: cluster health,currentslot/epochslot,(Solana)epochorprogresschain status (EVM),SOL/USDnative/USD priceANDand top trending pairs.Cheaperchainthan->making/x/solana/snapshot5|separate/x/base-fac/snapshotcalls.| /x/polygon-fac/snapshot. Pay-per-call ($0.01 USDC).
{"additionalProperties":false,"properties":{"chain":{"description":"Chain to query","enum":["solana","base","polygon"],"type":"string"}},"required":["chain"],"type":"object"}
[Solana by default]Full token due-diligence in ONE call:liveprice, liquidity, 24h volume, DEX pairs,on-chainsupply andmint(EVM)authority.contractUsemetadata.forchaintoken->research/x/solana/token-report/:tokeninstead|of/x/base-fac/token-report/:tokenmultiple|lookups./x/polygon-fac/token-report/:token. Pay-per-call ($0.01 USDC).
{"additionalProperties":false,"properties":{"mintchain":{"description":"SPLChain to query","enum":["solana","base","polygon"],"type":"string"},"token":{"description":"SPL mintaddress(Solana) or ERC-20 contract (EVM)","type":"string"}},"required":["mintchain","token"],"type":"object"}
Full decision pack in ONE call for a crypto coin: spot + 24h stats, last candle, indicators (RSI/EMA/SMA), perpetual funding + open interest, and order-book spread/imbalance. -> /x/crypto/deep/:symbol. Pay-per-call ($0.02 USDC).
Perpetual-futures context for a crypto coin: last funding rate (+%), mark vs index price, next funding time, and open interest (base + USD). -> /x/crypto/derivatives/:symbol. Pay-per-call ($0.005 USDC).
Technical indicators for a crypto coin: RSI(14) with overbought/oversold signal, EMA(20), EMA(50), SMA(20/50/200). Optional interval (default 1h). -> /x/crypto/indicators/:symbol. Pay-per-call ($0.005 USDC).
OHLCV candle history for a crypto coin: rows [openTime, open, high, low, close, volume]. Optional interval (1m,5m,15m,1h,4h,1d; default 1h) and limit (<=500). -> /x/crypto/ohlcv/:symbol. Pay-per-call ($0.005 USDC).
Order-book top-of-book for a crypto coin: best bid/ask, mid price, spread (abs + bps), bid/ask depth and book imbalance (>0 = more bids). -> /x/crypto/orderbook/:symbol. Pay-per-call ($0.005 USDC).
Live crypto spot price in USD for a coin (btc, eth, sol, bnb, xrp, ada, doge, avax, link, matic, arb, op): price + 24h change, high, low and quote volume. -> /x/crypto/price/:symbol. Pay-per-call ($0.002 USDC).
Pay-vs-do-not-pay decision for a payee, aggregating on-chain facts into a single verdict. chain -> /x/base-fac/should-pay/:address | /x/polygon-fac/should-pay/:address (EVM). Pay-per-call ($0.02 USDC).
Network health for a chosen chain. Paths: solana -> /x/solana/health, base -> /x/base-fac/health, polygon -> /x/polygon-fac/health. Pay-per-call from $0.001 USDC.
[Solana by default] BEFORE sending SOL/USDC to any address, run this: returns account type (wallet vs program vs closed), balance, activity, and a 0-100 risk score with reasons and a proceed/review verdict. Use it to avoid paying a dead, wrong or program address. Pay-per-call ($0.01 USDC).
[Solana by default] Whole-network picture in ONE call: cluster health, current slot, epoch progress, SOL/USD price AND top trending pairs. Cheaper than making 5 separate calls. Pay-per-call ($0.01 USDC).
Live price, liquidity, 24h volume + DEX pairs for a token. Paths: solana -> /x/solana/token/:mint, base -> /x/base-fac/token/:address, polygon -> /x/polygon-fac/token/:address. Pay-per-call from $0.002 USDC.
[Solana by default] Full token due-diligence in ONE call: live price, liquidity, 24h volume, DEX pairs, on-chain supply and mint authority. Use for token research instead of multiple lookups. Pay-per-call ($0.01 USDC).
Trending DEX pairs by 24h volume. Paths: solana -> /x/solana/trending, base -> /x/base-fac/trending, polygon -> /x/polygon-fac/trending. Pay-per-call ($0.02 USDC).
BEFORE paying a wallet/payee, get a multichain safe|review|avoid verdict built only from re-verifiable on-chain facts (existence, activity, USDC settlements, contract code). Covers Solana, Base and Polygon. Pay-per-call ($0.02 USDC).
Transaction status + transfer summary on a chosen chain. Paths: solana -> /x/solana/tx/:signature, base -> /x/base-fac/tx/:hash, polygon -> /x/polygon-fac/tx/:hash. Pay-per-call from $0.003 USDC.