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A peer-to-peer trade happens between two people, but the checks that keep it safe run on public data: whether a transaction confirmed, whether a quote is fair, and whether anyone has reported an address before.
The tools below answer those questions for free. Where a paid plan exists, each entry says what the free version covers, so you know what you are getting before you sign up for anything.
Selection criteria were simple. Each tool had to be free for its core job, useful to a P2P trader in particular, and live when checked in September 2026.
Block explorers
1. Etherscan
Etherscan (etherscan.io) is the best-known explorer for Ethereum mainnet. Paste a transaction hash to see whether a transfer confirmed, which token moved and where it went.
Its token pages also list each contract address, which you can compare against the issuer's own list before accepting a payment in a token you do not recognize.
2. Arbiscan
Arbiscan (arbiscan.io), built by the Etherscan team, does the same job for Arbitrum One. When a counterparty says they sent USDC on Arbitrum, this is where you confirm it arrived, and whether it was native USDC or the older bridged USDC.e.
3. Blockscout
Blockscout (blockscout.com) is an open-source explorer with instances for Polygon, Base, Arbitrum and dozens of other EVM networks, plus a cross-chain search. It makes a useful second opinion when your usual explorer is slow or stuck behind a verification page.
On Polygon it is also a quick way to check whether an incoming transfer was native USDC or the bridged USDC.e.
Gas and network costs
4. Etherscan Gas Tracker
The Etherscan Gas Tracker shows current Ethereum gas prices at several speed levels and estimates what common actions cost, such as swaps and bridging. Check it before funding or releasing escrow on mainnet, where fees swing the most.
5. L2BEAT
L2BEAT (l2beat.com) is not a fee tracker but a risk dashboard for Ethereum layer 2 networks. It shows each network's proof system and maturity stage, which is worth a look before you keep trading inventory on a newer chain.
At the time of writing, both Arbitrum One and Base are listed as Stage 1. L2BEAT's stages, from Stage 0 to Stage 2, summarize how mature each rollup's decentralization is.
Rates and stablecoin data
6. Xe Currency Converter
Xe (xe.com) shows the mid-market exchange rate between fiat currencies. Xe notes that the rate is for information only, which is exactly what you want from a neutral benchmark.
Use it to work out how far a P2P quote in INR, BRL or CAD sits above or below the market before you accept it.
7. CoinGecko
CoinGecko's coin pages (coingecko.com) show a volume-weighted price for assets such as USDT and USDC across many exchanges. The same pages list contract addresses for each supported chain, so one tab covers both price and token checks.
USDT itself trades very close to $1 on global markets. So when a local P2P quote sits well above that, the premium usually reflects local demand for dollars rather than anything about the token.
8. DefiLlama Stablecoins
The DefiLlama stablecoin dashboard (defillama.com/stablecoins) tracks market cap, supply and peg stability for major stablecoins, with filters by chain. It helps answer a practical question: how much of this stablecoin actually lives on the network you plan to settle on?
P2P-specific math
9. P2P spread and profit calculators
Spread math is where many new traders fool themselves, because fees, gas and payment costs hide inside the quoted price. Senpero's free P2P tools include a spread calculator, a profit calculator, an escrow fee calculator, a stablecoin premium calculator, a gas fee estimator and a live P2P spread index, which makes them handy for sanity-checking a trade before you post or accept an offer.
Wallet and counterparty safety
10. Revoke.cash
Revoke.cash lists the token approvals your wallet has granted to smart contracts and lets you revoke the ones you no longer need. P2P traders who fund escrow with ERC-20 tokens build up approvals quickly, so a monthly cleanup is a good habit.
The free version covers one chain at a time and includes an exploit checker. Each revoke is an on-chain transaction, so you pay network gas, while batch revokes and multichain dashboards cost extra.
11. Chainabuse
Chainabuse (chainabuse.com), launched by blockchain analytics firm TRM Labs, is a free, community-powered database of scam reports across multiple chains. Search a counterparty's address or a suspicious website before you trade.
A clean result is not proof of safety. A match, though, is a clear reason to walk away.
Records and taxes
12. Koinly
Koinly (koinly.io) imports wallets and exchange accounts and tracks your portfolio on its free plan, which covers up to 10,000 transactions. You can preview capital gains for free, but downloading tax reports requires a paid plan.
Active P2P traders generate many small disposals, so connecting wallets early saves a painful reconstruction at tax time.
A 60-second pre-trade routine
Bookmarks only help if you use them in order. Here is a quick sequence that covers most trades:
Check the reference rate on Xe or CoinGecko and calculate the spread you are paying or charging.
Search the counterparty's wallet address on Chainabuse.
Confirm the token contract matches the issuer's published address on the network you are using.
Check current gas on the settlement network so you hold enough of its gas token.
After the trade, verify the transaction on the right explorer and save the hash with your records.
Once a month, review approvals on Revoke.cash and sync your wallets to your tax tracker.
A word on fake tools
Be wary of any "free" checker that asks you to connect a wallet and sign a transaction just to show you data. Reading public blockchain data never requires a signature, and signing requests are how many wallet drainers get in.
Type the addresses above yourself or use saved bookmarks, rather than clicking links from chats or direct messages. None of these tools can make a bad counterparty honest. Together, they make it much harder for a mistake or a scam to slip through unnoticed.