Aether: Base onchain data & token risk (x402)

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Base token risk (honeypot sim), prices, balances, Basenames, tx data. Pay-per-call in USDC via x402.

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Copy this into your MCP client config:

{
  "mcpServers": {
    "Aether: Base onchain data & token risk (x402)": {
      "url": "https://aether-x402.vercel.app/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (23)

• base_token_risk_trial read-only

  FREE trial, no wallet or payment needed: is this Base token safe to buy, or a honeypot, rug pull or scam? The same verdict as base_token_risk (real buy and sell simulation, tax, mint, blacklist and pause powers, owner, liquidity), limited to 3 calls per caller per day. Input: token address. After the trial, use base_token_risk ($0.01 via x402)

  Parameters:

  • token (required) — string — Base ERC-20 contract address
  • simulate — boolean — Run the buy/sell simulation (default true)

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_token_risk read-only

  Is this Base token safe to buy, or a honeypot, rug pull or scam? Simulates a real buy and sell to prove the token can be sold and to measure buy and sell tax, then checks mint, blacklist, pause and fee powers, proxy upgradeability, owner and DEX liquidity. Input: token address. Returns a verdict (low, caution, high, avoid), a 0-100 risk score and the evidence. Check before an agent trades a token. Try it free first: 3 calls a day at POST /v1/base/token/risk/trial. Price: $0.01 USDC on Base via x402.

  Parameters:

  • token (required) — string — Base ERC-20 contract address
  • simulate — boolean — Run the buy/sell simulation (default true)

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_balance read-only

  Wallet balance on Base: the native ETH balance of any address, read live from the chain. Input: address. Price: $0.001 USDC on Base via x402.

  Parameters:

  • address (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_erc20_balance read-only

  ERC-20 token balance of a wallet on Base (USDC or any other token), formatted with symbol and decimals. Input: wallet address and token address. Price: $0.002 USDC on Base via x402.

  Parameters:

  • address (required) — string
  • token (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_portfolio read-only

  Wallet portfolio value on Base: ETH plus major tokens (or up to 20 tokens you choose), each holding priced in USD from live DEX prices, with the total. Input: wallet address. Price: $0.004 USDC on Base via x402.

  Parameters:

  • address (required) — string
  • tokens — array

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_allowance read-only

  ERC-20 allowance check on Base: how much a spender is still approved to move from an owner's token balance, and whether the approval is unlimited. Run before a swap, an approve or a revoke. Input: token, owner, spender. Price: $0.002 USDC on Base via x402.

  Parameters:

  • token (required) — string
  • owner (required) — string
  • spender (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_basename read-only

  Basename lookup: resolve a Base name such as jesse.base.eth to its wallet address, with avatar and profile text records. Input: name. Price: $0.01 USDC on Base via x402.

  Parameters:

  • name (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_tx read-only

  Base transaction lookup by hash: sender, recipient, value, function selector, block, and whether it succeeded or reverted. Price: $0.01 USDC on Base via x402.

  Parameters:

  • hash (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_receipt read-only

  Base transaction receipt by hash: success or reverted, gas used, and the decoded ERC-20 Transfer events showing which tokens moved between which addresses. Price: $0.003 USDC on Base via x402.

  Parameters:

  • hash (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_contract read-only

  What is this Base address? Wallet (EOA) or smart contract, code size, proxy implementation address, and whether it is an ERC-20, ERC-721 or ERC-1155 token. Price: $0.01 USDC on Base via x402.

  Parameters:

  • address (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_gas read-only

  Current gas price on Base in gwei: base fee, suggested priority fee and max fee per gas, read live from the chain. Price: $0.01 USDC on Base via x402.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_block read-only

  Base block lookup by number or tag (latest, safe, finalized): timestamp, gas and transaction count. Price: $0.01 USDC on Base via x402.

  Parameters:

  • block — ['string', 'integer']

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_token read-only

  Token info for any ERC-20 on Base by contract address: name, symbol, decimals and total supply. Price: $0.01 USDC on Base via x402.

  Parameters:

  • token (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_price read-only

  Token price on Base by contract address: live USD price and pool liquidity from Uniswap v2/v3 and Aerodrome. Works for any token with a DEX pool, including newly launched ones. Price: $0.003 USDC on Base via x402.

  Parameters:

  • token (required) — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_transfers read-only

  Recent ERC-20 transfers on Base for a token, a wallet, or both: who sent how much to whom, across up to 2,000 recent blocks (100 results max). Price: $0.01 USDC on Base via x402.

  Parameters:

  • token — string
  • blocks — integer
  • address — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_nft_owner read-only

  Who owns this NFT? Current owner of an ERC-721 token on Base by contract address and token id (ownerOf). Price: $0.01 USDC on Base via x402.

  Parameters:

  • contract (required) — string
  • tokenId (required) — ['string', 'integer']

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_nft_metadata read-only

  NFT metadata on Base for an ERC-721 or ERC-1155 token: token URI plus the name, image and attributes it points to, resolved from IPFS, Arweave, data URIs or https. Price: $0.005 USDC on Base via x402.

  Parameters:

  • contract (required) — string
  • tokenId (required) — ['string', 'integer']

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_call read-only

  Simulate a read-only contract call on Base (eth_call) without sending a transaction: returns the raw result or the revert reason. Use it to dry-run a call before signing. Price: $0.01 USDC on Base via x402.

  Parameters:

  • to (required) — string
  • data (required) — string
  • from — string
  • value — ['string', 'integer']

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• base_estimate_gas read-only

  Estimate the gas and the cost in ETH and USD of a Base transaction before signing it. Input: to, and optionally from, data and value. Price: $0.002 USDC on Base via x402.

  Parameters:

  • to (required) — string
  • from (required) — string
  • data — string
  • value — ['string', 'integer']

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• audit_x402_payability read-only

  x402 endpoint audit: can a paying agent actually pay this API? Probes any x402 URL and validates its 402 payment requirements (CAIP-2 network, USDC asset, payTo checksum, amount, EIP-712 domain, resource URL, Bazaar discovery). Returns pass, warn or fail, a 0-100 score and a fix for every failure. Price: $0.01 USDC on Base via x402.

  Parameters:

  • url (required) — string — Public https URL of the paid x402 endpoint to audit
  • body — Example JSON body the endpoint accepts
  • expect — object — What the paying caller needs: fails the audit if the endpoint cannot be paid this way
  • method — Defaults to POST when body is supplied, otherwise GET
  • headers — object — Non-credential headers the endpoint needs before its paywall (e.g. Idempotency-Key)

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• score_opportunity read-only

  How strong is this startup or deal on paper? Scores an opportunity across seven pillars weighted by stage (pre-seed to series B+), applies red flags, and returns a 0 to 10 score with pass, investigate or fail. Deterministic: the same input always gives the same score. A screening aid, not investment advice. Price: $0.01 USDC on Base via x402.

  Parameters:

  • opportunityName (required) — string
  • stage
  • pillars — array
  • redFlagIndices — array

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• triage_invoice read-only

  Which overdue invoice should be chased, and what is the next step? Send an invoice number, client reference, amount and days overdue; get its aging category and the next action to take. Deterministic rules, no AI: the same input always gives the same answer. Price: $0.01 USDC on Base via x402.

  Parameters:

  • invoiceNumber (required) — string
  • clientReference (required) — string
  • amount (required) — number
  • daysOverdue (required) — integer

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• audit_evidence read-only

  Does this write-up back up what it claims? Send up to 40,000 characters of text; get the claims that cite no evidence, contradictions, missing evidence and documentation gaps, with fixes. Deterministic rules, no AI. Rejects text containing secrets. A documentation review, not legal or financial advice. Price: $0.01 USDC on Base via x402.

  Parameters:

  • text (required) — string
  • request — string

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

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Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.