MARKET MONITOR / CATALOGUE Services 133,140 MCP listed 40,873 x402 92,349 Rails Base / Solana / Polygon / Arbitrum Imported 2026-10-31 · 3 sources
Task

Allowance

45 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

AllowanceGuard x402 REST usage

Decide whether to grant an ERC-20, NFT or Permit2 allowance before signing it. Send owner, token, spender and amount, or the unsigned approve, setApprovalForAll or Permit2 calldata. Returns allow, warn, block or unknown...

allowance.schemasure.com Crypto & Payments 14 calls / 30d checked 2026-10-31
0.03 USDC per call per call

Spend Permission Auditor x402 REST usage

🆕 Base Account spend permissions let an app or agent spend a scoped, recurring allowance from a wallet — the primitive behind autonomous agent payments on Base. This reconstructs a wallet's ACTIVE spend permissions from...

402.com.tr Crypto & Payments 7 calls / 30d checked 2026-10-31
0.05 USDC per call per call

EVM State Batch x402 REST usage

Read-only EVM state API for wallet snapshots, ERC-20 balances, token allowances, contract code, block heights, and bounded eth_call reads across Ethereum, Base, Arbitrum, Optimism, and Polygon. Fixed price: $0.05 USDC on...

evmstate.com Crypto & Payments 6 calls / 30d checked 2026-10-31
0.05 USDC per call per call

Approval advisor x402 REST usage

Ranks a wallet's active token approvals by USD-at-risk x unlimited-allowance x unlabelled-spender, and returns a prioritised revoke queue. Approvals are the #1 drain vector; this tells an agent exactly what to revoke fir...

402.com.tr Crypto & Payments 5 calls / 30d checked 2026-10-31
0.05 USDC per call per call

stall-row x402 REST usage

Fetch one web page and return its main content as clean Markdown with title and word count, extracted server-side. Private and loopback targets are refused. Use this when an agent needs to read a page inside a workflow w...

stall-row-production.up.railway.app Web & Scraping 9 calls / 30d checked 2026-10-31
0.01 USDC per call per call

Saylor Innovations On-Chain Data x402 REST usage

Ethereum block by number or latest - hash, time, transaction count, gas used, base fee and miner

saylorinnovations.com Crypto & Payments 7 calls / 30d checked 2026-10-31
0.01 USDC per call per call

Saylor Innovations Guide Library x402 REST usage

CUDA, driver and Ollama compatibility - GPU support, model memory fit and proof inference uses the GPU

saylorinnovations.com AI Models & Inference 6 calls / 30d checked 2026-10-31
0.01 USDC per call per call

Approval Exposure Report x402 REST usage

Approval Exposure Report by Agentropolis: every open ERC-20, NFT-operator and Permit2 approval on a Base wallet, flagging unlimited allowances, plain-wallet or unverified spenders and drainer patterns -> clean / review /...

seenly-token-preflight.vercel.app Crypto & Payments 2 calls / 30d checked 2026-10-31
0.02 USDC per call per call

Aether x402 REST usage

Wallet balance on Base: the native ETH balance of any address, read live from the chain. Input: address

aether-x402.vercel.app Crypto & Payments 30 calls / 30d checked 2026-10-31
0.001 USDC per call per call

approvals-wallet x402 REST usage

Standing-state audit of a wallet's live ERC-20 token approvals. Indexes every approval the address ever granted, filters to those still live on-chain, flags unlimited, stale, scam-listed and canonical spenders, estimates...

api.agentstools.dev Crypto & Payments 1 calls / 30d checked 2026-10-31
0.02 USDC per call per call

ERC-20 allowance (owner to x402 REST usage

How much of an ERC-20 token a spender contract is approved to move from an owner wallet - the approval check an agent runs before a swap, a bridge, or an x402 transferWithAuthorization flow. Returns the allowance as an e...

agent402.tools Crypto & Payments 10 calls / 30d checked 2026-10-31
0.002 USDC per call per call

Token allowance, Arbitrum ERC-20 x402 REST usage

Token allowance, Arbitrum ERC-20. ERC-20 token allowance on Arbitrum One: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an app...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 4 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Ethereum ERC-20 x402 REST usage

Token allowance, Ethereum ERC-20. ERC-20 token allowance on Ethereum: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approva...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 4 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Optimism ERC-20 x402 REST usage

Token allowance, Optimism ERC-20. ERC-20 token allowance on Optimism: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approva...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 4 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Polygon ERC-20 x402 REST usage

Token allowance, Polygon ERC-20. ERC-20 token allowance on Polygon PoS: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an appro...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 4 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Chain Allowance x402 REST usage

ERC-20 allowance(owner, spender) on Base, raw + formatted, flags unlimited approvals.

x402-data-api.sigrunner.workers.dev Data & Finance 6 calls / 30d checked 2026-10-31
0.002 USDC per call per call

chain-erc20-allowance x402 REST usage

ERC-20 allowance a wallet has granted a spender, and whether it is unlimited: send "token,owner,spender". Default chain Base; prefix another: ethereum:, arbitrum:, optimism:, polygon:, bsc:. $0.01 per call.

chain.intel.rallylive.ca Crypto & Payments 1 calls / 30d checked 2026-10-31
0.01 USDC per call per call

x402 Spend Cap/Allowance Check x402 REST usage

Check an agent wallet's x402 spend cap before it pays, via Liquid Logic X: send a wallet and optional endpoint URL, get allowed, reason, remainingUsdc, capUsdc, spentUsdc from the published policy. $0.001 USDC on Base.

audit.liquidlogicx.com Crypto & Payments 10 calls / 30d checked 2026-10-31
0.001 USDC per call per call

Token allowance, Linea ERC-20 x402 REST usage

Token allowance, Linea ERC-20. ERC-20 token allowance on Linea: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval befo...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 3 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Scroll ERC-20 x402 REST usage

Token allowance, Scroll ERC-20. ERC-20 token allowance on Scroll: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval be...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 3 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Avalanche x402 REST usage

Token allowance, Avalanche. ERC-20 token allowance on Avalanche: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval bef...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 3 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Berachain x402 REST usage

Token allowance, Berachain. ERC-20 token allowance on Berachain: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval bef...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 3 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Celo ERC-20 x402 REST usage

Token allowance, Celo ERC-20. ERC-20 token allowance on Celo: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval before...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 3 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Token allowance, Gnosis ERC-20 x402 REST usage

Token allowance, Gnosis ERC-20. ERC-20 token allowance on Gnosis: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval be...

agent-data-tools.revmesh2074.workers.dev Crypto & Payments 3 calls / 30d checked 2026-10-31
0.003 USDC per call per call

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