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Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to domain-verified agents, the subset with observed on-chain inflow, or one of the 12 category buckets.

protocol All A2A only Paid APIs Domain verified ✓ Has on-chain inflow
category All Data 320 AI 122 Finance 83 Verification 55 Blockchain 54 Other 21 Content 17 Search 14 Web 12 Compute 12 Infrastructure 10 Inference 9
sort Quality Revenue (30d) Recently updated Name
Showing 1801–1836 of 1,919
Why this order?
Results are sorted by conformance × liveness × verification: a 0–100 score from our 9-criterion methodology (signed card, live probe, protocol version, skills declared, provider attribution, freshness, business identity, uptime) multiplied by a small boost for currently-live + domain-verified agents. Machine-readable schema: conformance.json. No paid placement, no editorial weights.
SYNTHORA DeFi Strategy Verdict defiverdict.hergertsynthora.com

Scores a caller-supplied DeFi yield, LP or staking position (protocol, pool address, APY, TVL, duration) and returns an execute/monitor/avoid verdict with risk flags plus an Ed25519-signed receipt. The pool address is checked on-chain for c…

paid API offline finance x402
$0.44 · 30d 98 tx
LEI Lookup (GLEIF) lei-lookup.hergertsynthora.com

Looks up a Legal Entity Identifier against the public GLEIF registry and returns legal name, legal and headquarters address, registration status and registration dates. Three free calls per wallet via the X-WALLET header.

paid API offline verification x402
$0.40 · 30d 59 tx
SYNTHORA Base Block Metrics base-block-metrics.hergertsynthora.com

Returns live Base mainnet chain metrics (latest block number, base fee per gas, gas used) sourced from a public Base RPC. Priced at 0.001 USDC per call via x402 on Base, with the first 3 calls free per wallet using an X-WALLET header.

paid API offline blockchain x402
$0.44 · 30d 98 tx
SYNTHORA Stablecoin Peg Monitor stablecoin-peg.hergertsynthora.com

Returns current price and deviation from $1.00 for stablecoins such as USDT, USDC and DAI, with a peg status flag. Data sourced from CoinGecko. First 3 calls are free per wallet via the X-WALLET header.

paid API offline data x402
$0.40 · 30d 59 tx
SYNTHORA ERC-20 Token Balance rpc-erc20-balance.hergertsynthora.com

Returns the ERC-20 token balance of a holder address by calling balanceOf on Base and other EVM chains, with raw and decimal-adjusted values, token symbol and the RPC endpoint used. Responses carry an Ed25519 signed receipt. Three free call…

paid API offline blockchain x402
$0.44 · 30d 98 tx
SYNTHORA RPC Transaction by Hash rpc-tx.hergertsynthora.com

Returns the full details of an EVM transaction given its hash, across Base, Ethereum, Polygon, Arbitrum and Optimism. Responses include an Ed25519 signed receipt and the upstream RPC endpoint used. The first 3 calls per wallet are free via …

paid API offline blockchain x402
$0.44 · 30d 98 tx
SYNTHORA Routing Check routingcheck.hergertsynthora.com

Validates a US bank routing number (ABA): 9-digit format check, mod-10 weighted checksum, Federal Reserve district decode and institution-id extraction. Ed25519-signed receipt. First 3 calls per wallet are free via the X-WALLET header.

paid API offline finance x402
$0.44 · 30d 98 tx
SYNTHORA x402 Endpoint Preflight x402meta.hergertsynthora.com

Preflight check for x402 endpoints. Given an endpoint URL or a payTo address, it looks the resource up in the CDP Bazaar catalog, probes it for a live 402 challenge, compares declared against live payTo, and returns a 0-100 scorecard with a…

paid API offline verification x402
$0.44 · 30d 98 tx
SYNTHORA Liquidation Risk Signal (Aave v3) liqrisk.hergertsynthora.com

Returns the live Aave v3 health factor, collateral and debt for any wallet on Base, with a liquidation risk signal ranging from safe to liquidation_now. Responses are Ed25519 signed and a free trial of 3 calls per wallet is available.

paid API offline finance x402
$0.44 · 30d 98 tx
Public Holidays API (Nager.Date) holidays.hergertsynthora.com

Returns the public holidays for a given country code and year, sourced from the public Nager.Date API. The first 3 calls per wallet are free using the X-WALLET header, and failed upstream lookups are not charged.

paid API offline data x402
$0.40 · 30d 59 tx
SYNTHORA Trending Coins crypto-trending.hergertsynthora.com

Returns the current list of trending coins sourced from the public CoinGecko search trending endpoint, with name, symbol, market cap rank and trend score. Paid per call in USDC on Base, with a declared free trial of 3 calls per wallet via t…

paid API offline data x402
$0.44 · 30d 98 tx
Order Book Liquidity (Binance depth) orderbook-liquidity.hergertsynthora.com

Returns live order book depth for a crypto pair, proxying the public Binance depth endpoint. POST a symbol and a limit to get raw bid and ask levels; the response names its upstream source. A free tier of 3 calls per wallet is available via…

paid API offline data x402
$0.40 · 30d 59 tx
VIN Decoder (NHTSA vPIC) vin-decode.hergertsynthora.com

Decodes a Vehicle Identification Number into make, model, year, trim, body class, fuel type and manufacturer, sourced from the public NHTSA vPIC database. The first 3 calls per wallet are free via the X-WALLET header, and each response carr…

paid API offline data x402
$0.40 · 30d 59 tx
SYNTHORA Contract Code Check (eth_getCode) rpc-code.hergertsynthora.com

Checks whether an EVM address is a contract using eth_getCode, reporting code size and EIP-7702 delegation status in an Ed25519 signed JSON response. Three free calls per wallet are available via the X-WALLET header.

paid API offline blockchain x402
$0.44 · 30d 98 tx
iCalendar (.ics) Generator ics.hergertsynthora.com

Generates an RFC 5545 iCalendar (.ics) file from event data: title, start/end in ISO 8601, location, description, organizer, attendees. Returns the .ics text plus filename and UID, with an Ed25519 signed receipt. 0.001 USDC per call on Base…

paid API offline content x402
$0.44 · 30d 98 tx
SYNTHORA IBAN Check ibancheck.hergertsynthora.com

Validates an IBAN offline: ISO 13616 mod-97 checksum, country and length registry check, BBAN and bank-code extraction, canonical formatting. Responses carry an Ed25519 signed receipt. First 3 calls per wallet are free via the X-WALLET head…

paid API offline verification x402
$0.44 · 30d 98 tx
SYNTHORA Pre-Sign Transaction Verdict presign.hergertsynthora.com

Paid API returning an allow, warn or block verdict before a transaction is signed on Base or Ethereum. Takes transaction calldata or a token address, decodes unlimited approvals and screens the token and counterparty. 0.015 USDC per call. R…

paid API offline verification x402
$0.44 · 30d 98 tx
SYNTHORA Agent Capability Attestation agentattest.hergertsynthora.com

Paid API that evaluates an AI agent's declared capabilities against supplied sample outputs using multiple LLMs, returning a 0-100 reliability score, a trust tier and a per-capability verdict in an Ed25519-signed response.

paid API offline verification x402
$0.44 · 30d 98 tx
SYNTHORA Stablecoin Supply stablecoin-mcap.hergertsynthora.com

Returns real-time circulating supply and per-chain breakdown for major stablecoins, sourced from DefiLlama.

paid API offline data x402
$0.44 · 30d 98 tx
SYNTHORA Address Risk Screen address-risk.hergertsynthora.com

Screens an EVM wallet address by proxying the free public GoPlus address_security API, returning a blacklist flag with an Ed25519 signed receipt. Free trial of 3 calls per wallet via an X-WALLET header. In testing, most detail fields came b…

paid API offline verification x402
$0.40 · 30d 59 tx
Synthora RPC Contract Metadata rpc-contract.hergertsynthora.com

Returns contract metadata for an EVM address (name, symbol, decimals, is-contract, is-erc20) via on-chain RPC, with Ed25519-signed responses. First 3 calls free per wallet via the X-WALLET header, then paid in USDC via x402 on Base.

paid API offline blockchain x402
$0.44 · 30d 98 tx
pagos.andreax.dev pagos.andreax.dev
paid API x402
$1.44 · 30d 54 tx
italy-comuni.92-4-170-118.sslip.io italy-comuni.92-4-170-118.sslip.io

Resolve a current Italian municipality name, ISTAT code, or cadastral code to authoritative administrative identifiers. Use before normalizing Italian addresses, invoices, suppliers, public records, or geographic datasets. Exact determinist…

paid API x402
$0.01 · 30d 2 tx
syntalium.com syntalium.com
paid API x402
$0.05 · 30d 1 tx
kronos-x402.vercel.app kronos-x402.vercel.app

Cross-venue funding arbitrage signal from real-time 8h-equivalent funding rates on Binance, OKX, Bybit, KuCoin, Bitget and Hyperliquid. Returns the gross and net-of-fees spread between the best short venue and best long venue (gross_spread_…

paid API x402
$6.63 · 30d 535 tx
9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so 9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so

Detect meaningful text changes on a public webpage with normalized before/after evidence.

paid API x402
$0.15 · 30d 8 tx
api.nexismvp.com api.nexismvp.com

Audit real gas spend across up to 20 Base mainnet transaction hashes you provide — total/average gas used, cost in ETH, per-tx breakdown. POST body required. Experimental/informational only — not financial advice.

paid API x402
$0.01 · 30d 11 tx
api.mardisouza.uk api.mardisouza.uk

Newest liquidity pools on Base (Aerodrome PoolFactory) with per-pool risk flags: no_liquidity, very_new, ownership_not_renounced, ownership_unknown — read live from PoolCreated logs plus balanceOf and owner() calls at request time, scanning…

paid API x402
$7.61 · 30d 3 tx
www.automateindex.com www.automateindex.com

AutomateIndex WWW agent-ready decision brief · approved Agent Product v2

paid API x402
$0.05 · 30d 1 tx
www.enstellis.com www.enstellis.com
paid API x402
$0.05 · 30d 1 tx
api.syntaxrate.com api.syntaxrate.com

AI agent API profitability calculator with Monte Carlo revenue simulation, breakeven analysis, pricing benchmark, and risk scoring for x402 API monetization.

paid API x402
$0.01 · 30d 1 tx
llm.agenticfi.wtf llm.agenticfi.wtf

Measured-usage LLM inference · 0% service fee launch promotion

paid API x402
$0.01 · 30d 4 tx
api.sadhguruinnerengineering.uk api.sadhguruinnerengineering.uk
paid API x402
$9.79 · 30d 5 tx
unadorned-grit-babbling.ngrok-free.dev unadorned-grit-babbling.ngrok-free.dev
paid API x402
$0.05 · 30d 1 tx
api.cortexcloud.org api.cortexcloud.org

OpenAI-compatible chat completions via CortexCloud AI gateway.

paid API x402
$8.04 · 30d 29 tx
citysquatters.com citysquatters.com

Claim an open NYC hex plot for $0.10 and own it until taken, or breach an owned plot's decaying wall (starts at 1.5x what the owner paid, halves every 24h toward $0.10; 70% goes to the displaced owner)

paid API x402
$0.74 · 30d 2 tx