Every agent-payable API.

Profile of a Base address before you transact with it: EOA or contract, first and last seen, transaction and counterparty counts, contract-verification status, and any flags raised. Behavioural signals only — they describe activity, not intent.

Drawdown percent from peak to trough for risk reports. Call when measuring path risk on an equity or price series peak/trough pair. Returns drawdown percent as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

drone-delivery-window: Drone Delivery Window Optimizer – binary feasibility check for outdoor delivery routes based on wind, visibility, rain/snow intensity, and frost thresholds.

Drop null/empty values from a list. Call when you clean agent arrays before serialization. Returns compacted items, count, removed for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Drop the first N elements. Call when you skip headers or already-processed agent rows. Returns remaining items and count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Full B2B due-diligence dossier on a French company in ONE call, with an adaptive-depth engine: cheap KYB triage, then deep-dive (insolvency proceedings, BODACC legal events, solidity score) ONLY if a risk is flagged. Returns a ready risk verdict (GREEN/ORANGE/RED) + identity + officers + VAT VIES. Saves the buyer 5 calls and the orchestration logic. Query: ?q=<name or SIREN>

A durable timer for stateless agents. POST {interval_seconds, count} registers a schedule; GET ?id= returns the ticks that have accrued since your last poll (computed on read — no work runs in the background). An agent can't schedule its own future wake; poll this to know how many intervals have elapsed.

Durable outcome promise for agents: pay $0.01 USDC once, wait for a time or signed webhook condition, then claim an opaque continuation envelope with an Ed25519 receipt. Idempotent replay, no subscription, no polling provider, and no continuation is exposed before the capability check.

An agent skill that farms DustSwap points on Base mainnet unattended: daily on-chain check-in plus swap-volume quests that actually get credited. 414 lines, language-agnostic. Exact endpoints and payloads, the attribution config a swap must carry or it earns nothing, headless login, official progress reading, spend-capped pacing, pinned addresses, and seven costly pitfalls. Proven with real funds. Under $1. Points have no announced conversion rate — a recipe, not a yield promise.

Dutch address dossier by postcode + house number: the address, its BAG building (bouwjaar, floor area, use function), its AHN height above NAP, and CBS key figures for its gemeente — in one call. Send the parameters in a JSON request body via POST. Payment constitutes acceptance of the terms at https://agenticweb.nl/terms.

Dutch elevation lookup by postcode or coordinate: ground height above NAP, surface height and derived object height, from the AHN 0.5 m height model. Send the parameters in a JSON request body via POST. Payment constitutes acceptance of the terms at https://agenticweb.nl/terms.

Dutch supplier screening — pre-transaction check in one call: validates the EU VAT number (VIES), checks the official Dutch Central Insolvency Register for bankruptcy, suspension of payments or debt restructuring, and cross-checks the legal name against the VAT-registered name where available. Requires legal_name, kvk_number and vat_number. Returns factual attention items with a source reference per finding — no risk scores. Only charged when both registers were consulted. Companies only.

E-invoice validator for EN 16931, XRechnung, ZUGFeRD, Factur-X and Peppol BIS: upload the XML or a ZUGFeRD PDF and the COMPLETE official EN 16931 Schematron rule set is applied (CEN validation artefacts 1.3.16, unmodified) plus totals arithmetic and VAT category checks. Every finding carries its official BR- rule code and severity; the result is signed and independently verifiable.

E.164 format, type, country code. Pay per call with USDC (x402) or credits - archtools.dev

ECB FX reference rates for agents at $0.001 USDC. Call when you need daily EUR/USD/BRL (and other published pairs) with source attribution—not a live broker quote or trade execution. Returns bounded cross-rates via x402; informational only, no trading advice.

Forward + reverse ENS resolution on Ethereum mainnet: turn vitalik.eth into an address, or an address into its primary ENS name. Complements the Basename resolver for Base.

ERC-20 token balance for a wallet against one token contract, on Ethereum, from Etherscan's V2 API. Requires contract_address as a query param. Returns the raw balance in the token's smallest unit (decimals aren't included in this endpoint's response). $0.01/call.

Total supply for an ERC-20 token contract, from Etherscan's V2 API. Raw value only, no market data -- for price/market cap use /crypto-prices instead. $0.005/call.

Recent ERC-20 token transfer events for a wallet address on Ethereum in one call: token name/symbol, decimal-adjusted value, and counterparties -- from Etherscan's V2 API. Optionally filter to one token via contract_address. Supports optional limit (default 25, max 100). $0.01/call.

ERC-20 balanceOf for a holder on Base mainnet for $0.001 USDC via eth_call. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

ERC-20 name/symbol/decimals on Base for $0.001 USDC via eth_call. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

Get ERC20 token balance for any wallet and token contract on Base (or Ethereum). Returns balance, decimals, and symbol via balanceOf. Use for live ERC20 holdings checks without an API key.

ESG score intelligence for ESG-investing and research agents. Explains MSCI, Sustainalytics, ISS, and Bloomberg ESG methodologies, how raters diverge, and what drives score changes.

ETH risk-neutral price distributions at 12 horizons via Breeden-Litzenberger from SVI surfaces — quantiles, P(up/down 10/20%), sigma ranges, skewness — Ed25519 signed attestation

ETH balance of a Base mainnet address, incl. balance_usd.

Ethereum (ETH-USD) spot price, delayed, via Yahoo Finance

Current ETH price in USD and BTC, from Etherscan's V2 API. A quick single-value price check -- for market cap/volume/supply detail use /crypto-prices instead. Not address-specific. $0.005/call.

ETH same-day price distribution from Polymarket — median, quantiles (p10-p90), entropy — Ed25519 signed attestation

Real-time risk-weighted ETH liquid staking APY on Ethereum mainnet: Lido/Rocket Pool/Coinbase Wrapped Staked ETH/Frax Ether/Binance Staked ETH via DefiLlama, source tagged per reading (never estimated). Staking yield, not a Base lending market. EIP-712 signed by the payment-receiving address (see X-Signal-* headers). Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at /track-record.

How long an ETH liquid staking leadership call actually holds — same contract as the lending persistence routes. Median lead duration, survival at 6/24/72h, and the round-trip share of leader rotation. Observed history with sample sizes, never a forecast. Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at /track-record.

Buyer-side MOVE/HOLD decision for ETH liquid staking (Ethereum mainnet) — same contract as the lending decision routes, for ETH staking. Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at /track-record.

Total ETH supply, from Etherscan's V2 API. Not address-specific. $0.01/call.

ETH/USD spot via AgentKit x402 — $0.001 USDC

Company register lookup from the official national registers: France (Annuaire des Entreprises), Norway (Brønnøysund), Czechia (ARES), Finland (PRH), Slovakia (RPO), Poland (KRS). Name, registration number, status, legal form, address and registration date, normalised. Search by name or registration number.

Schedules a deadline-bound compute, DePIN, battery or power-trading workload into an actionable German or European power window. Returns exact timing, expected EUR cost and savings, uncertainty, freshness, expiry and decision trace.

Returns licensed ENTSO-E and SMARD spot-market context for compute, DePIN, battery and power-trading agents: published day-ahead prices, volatility, load, renewable share when available, the observed share of published negative-price hours, uncertainty, freshness and expiry.

Schedules a deadline-bound compute, DePIN, battery or power-trading workload into an actionable German or European power window. Returns exact timing, expected EUR cost and savings, uncertainty, freshness, expiry and decision trace.

Returns licensed ENTSO-E and SMARD spot-market context for compute, DePIN, battery and power-trading agents: published day-ahead prices, volatility, load, renewable share when available, the observed share of published negative-price hours, uncertainty, freshness and expiry.

EU sanctions screening (AML/KYC): check a person or company name against the official EU consolidated financial sanctions list (FSF, European Commission). Fuzzy matching, returns programme, EU reference, regulation, countries, birth dates and the source date. Updated daily. Pay per check, no account needed.

Validates the format of an EU VAT number (VAT ID, USt-IdNr, reverse charge) against the European Commission's published format table: 27 member states plus GB and XI. Format only, never validity - no VIES call, and the response says so. Reports every published pattern with its match status, enforces note 4 for ES, honours case sensitivity, and names the source's own contradictions: BE prints two patterns while note 2 denies one, RO prints nine digits while its description allows two to ten.

EU VAT decision engine for invoicing and e-invoicing: determines place of supply, reverse charge, intra-Community supply, export or domestic VAT, returns the rate and the EN 16931 / UNCL5305 VAT category code (BT-151) plus exemption reason code (BT-121) and ready-to-use invoice wording (EN/DE) with the legal article reference. For XRechnung, ZUGFeRD, Peppol BIS and OSS workflows.

EU VAT decision engine for invoicing and e-invoicing: determines place of supply, reverse charge, intra-Community supply, export or domestic VAT, returns the rate and the EN 16931 / UNCL5305 VAT category code (BT-151) plus exemption reason code (BT-121) and ready-to-use invoice wording (EN/DE) with the legal article reference. For XRechnung, ZUGFeRD, Peppol BIS and OSS workflows.

EVM address checksum and validation tool — normalize one Ethereum-compatible address and validate mixed-case EIP-55 input offline.

Keccak Merkle tree and proof builder — generate indexed sorted-pair inclusion proofs with domain separation and explicit odd-node promotion.

Strict Solidity ABI calldata decoder — decode canonical EVM smart-contract function calls or typed values, verify selectors, and reject ambiguous offsets or padding.

Keccak Merkle proof verifier — validate inclusion plus exact leaf index and count proof shape for the Atlas sorted-pair tree profile.

Solidity ABI calldata encoder — encode canonical typed values for an EVM smart-contract function call, with an optional selector and exact 256-bit integers.

Solana Program Derived Address (PDA) calculator — derive the canonical off-curve address and bump from bounded public seeds offline, without RPC or key handling.

CREATE2 deterministic contract address calculator — derive the EIP-1014 EVM deployment address, preimage, hashes, and EIP-55 checksum offline without RPC.

EVM Access List Shape Check: EVM Access List Shape Check checks bounded EIP-2930 access-list address and storage-key shapes from bounded caller-supplied values without an external provider. Call EVM Access List Shape Check before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Access List Shape Check as versioned determin…