Paid APIs

💰 Paid API mailcheck.hergertsynthora.com verification $0.0010/call $0.44 earned 30d

mailcheck.hergertsynthora.com · wallet 0x1080…7de0

Email address validation API. Returns RFC syntax check, live MX lookup, disposable and role account flags, free provider detection, gmail normalization, and a deliverability status with confidence sco…

💰 Paid API IntentFence Policy Agent verification $0.0010 – $1.0000

agentpass-protocol.rmalka06.chatgpt.site · wallet 0x833c…3a5e

Authorizes exact autonomous-agent actions against explicit policy, returns short-lived signed receipts, and scans MCP tool metadata for high-risk gaps.

💰 Paid API PayanAgent Marketplace verification $0.0010 – $0.0050 $2.65 earned 30d

payanagent.com · PayanAgent · wallet 0x1274…d0b6

The marketplace for the agent economy. 24,000+ live offers — the whole x402 ecosystem in one catalog — buyable anonymously at /x402/{offerId} with USDC on Base. Four verbs: buy, offer, request, fulfil…

💰 Paid API rubric-protocol.com verification $0.0010 – $0.1000 $0.26 earned 30d

rubric-protocol.com · wallet 0xab67…54ca

Post-quantum attestation and evidence services for AI agents. Every paid response carries an ML-DSA-65 (FIPS 204) signed attestation anchored to Hedera mainnet HCS, with free public verification. Cata…

💰 Paid API Bounty Truth API verification $0.0010/call $0.00 earned 30d

happybirthday.digitalshop.xin · wallet 0x2347…7f19

Deterministic preflight risk checks for public GitHub bounty issues. Uses live issue, repository, maintainer, and competing pull-request evidence to return a verdict, risk score, signals, and source f…

💰 Paid API AgentBiz verification $0.0030/call

api.mysterio.cloud

Three keyless pay-per-call services for AI agents on Base mainnet. Verify: signed attestations that a site was reachable, a file is unchanged, a TLS certificate says what it claims, or JSON matches a …

💰 Paid API PulseFeed x402 Trust Oracle verification $0.0040 – $1.0000

pulsefeed.dev · PulseFeed

Ask before you pay: PulseFeed tells an AI agent whether an x402 payment endpoint is safe to pay — liveness, anomaly scan (receiver-address changes between observations, catalog price vs. challenge pri…

💰 Paid API x402.fuchss.app verification $0.0050 – $0.0200 $0.02 earned 30d

x402.fuchss.app · wallet 0xbbec…9285

Deterministic trust scoring and monitoring for the x402 ecosystem. 88k+ endpoints tracked 24/7 on Base + Solana: probe reliability, latency, spec compliance, price history, and real on-chain USDC sett…

💰 Paid API nsgoods Sanctions Screening Oracle verification $0.0050/call

sanctions.nsgoods.org

Multi-chain OFAC SDN exact-address screening. 960 sanctioned addresses across 19 chains, parsed directly from the US Treasury sdn_advanced.xml, including the Solana entries the Chainalysis on-chain or…

💰 Paid API hermesplant.com verification $0.0100 – $2.0000 $5.43 earned 30d

hermesplant.com · wallet 0x5171…4c1b

Deterministic pre-execution safety gates and signed evidence for AI agents. The Action Safety pair scores consequential shell, Git, SQL, infrastructure, and deployment commands, returning risk, matche…

💰 Paid API Aegis verification $0.0100/call

aegis.borisinc.com · Boris Inc

The trust and reputation layer for the x402 agent economy. Before your agent pays an unknown service, check its verification-backed trust score (0-100) - built from continuous live probes plus paid de…

💰 Paid API CapGain onchain safety APIs verification $0.0100 – $0.0200 $0.03 earned 30d

5-9-107-124.nip.io · wallet 0xa600…3e8c

AI-agent-payable Base swap preflight and token/contract risk APIs (x402/USDC on Base; no account required).

💰 Paid API verza.dev verification $0.0100 – $0.2500 $0.01 earned 30d

verza.dev · wallet 0x6382…4c15

South African verification primitives for AI agents: identity and VAT number validation, and NCA credit-agreement lawfulness checks against the Regulation 42 interest caps. CIPC company lookup in deve…

💰 Paid API dokimo.augaster.com verification $0.0100/call $0.05 earned 30d

dokimo.augaster.com · wallet 0xb3cc…1772

Pay-per-call x402 endpoint that independently recomputes a Merkle evidence proof to its committed root and returns a signed attestation. Part of Dokimo, a non-custodial ASC-606 revenue subledger that …

💰 Paid API Nishvault x402 Pre-Send Guard verification $0.0100/call

x402-discovery.nishvault.com

0.01 USDC on Base for pre-send EVM transaction simulation for AI agents. Returns an x402 v2 challenge and, after payment, a preflight result and proof receipt; never broadcasts the transaction.

💰 Paid API Herramientas Cobrables verification $0.0100 – $0.2500

herramientas-cobrables.consultoressasic.chatgpt.site

Small deterministic pay-per-use services for AI agents: JSON contract validation, business margin and break-even calculations, and public stock quotes. Payments settle with x402 v2 using USDC on Base.

💰 Paid API FractalAI � Post-Quantum Proofs for AI Agents verification $0.0100 – $0.0500

fractalai.net.co

Post-quantum (CRYSTALS-Dilithium-2, NIST FIPS 204) services for autonomous agents, payable per call in USDC on Base: Dilithium-2 signing, PQC signature verification, AI decision attestation (VAID-1), …

💰 Paid API trustfetch.duckdns.org verification $0.0150 – $0.1200 $0.14 earned 30d

trustfetch.duckdns.org · wallet 0x1f5f…ae34

Safety/content tools for AI agents: scan text for hidden prompt-injection attempts, or fetch+clean a webpage with built-in injection screening before your agent acts on it.

💰 Paid API lionx402.com verification $0.0200 – $0.0400 $12.86 earned 30d

lionx402.com · wallet 0x68e3…85b5

AML wallet + company counterparty checks for AI agents. $0.001 wallet-screen (PASS/WARN/BLOCK OFAC check), $0.05 compliance bundle (OFAC + domain trust + firmographics), $0.012 deep research, $0.95 ve…

💰 Paid API tokenrisk.hergertsynthora.com verification $0.0200/call $0.44 earned 30d

tokenrisk.hergertsynthora.com · wallet 0x1080…7de0

Takes a token contract address on Base or Ethereum and returns a safe, caution, risky or rug_pull verdict, combining GoPlus token security data (honeypot simulation, buy and sell tax, holder count, ow…

💰 Paid API watchtower verification $0.0200/call $0.02 earned 30d

watchtower-api.com · Watchtower · wallet 0x8a06…9ff2

Compliance & data-integrity for AI agents: sanctions/watchlist screening (10 official lists — OFAC SDN+Consolidated, UN, EU, UK OFSI, Canada, Australia, France, Switzerland, US SAM exclusions — ~229k …

💰 Paid API Vibes-Coded Agent Tool API verification $0.0200 – $0.1000 $1.12 earned 30d

vibes-coded.com · wallet FmC5pY…LjMB

Pay-per-call reliability and intelligence APIs for AI agents on Solana USDC via x402: destructive-action, infra-target, tool-call-budget, agent-state, drift, retry-storm guards, action receipts, and 9…

💰 Paid API Second Opinion verification $0.0200 – $0.7500 $0.23 earned 30d

secondopinionx402.com · Second Opinion · wallet 0xa12d…ed30

Adversarial verification for AI agents: an independent skeptic attempts to refute a claim before the agent acts on it, returning a structured verdict (refuted / supported / inconclusive) with calibrat…

💰 Paid API datasourcepulse.com verification $0.0200/call

datasourcepulse.com · wallet 0x7ccb…ab36

One live health check on a data source, one instant machine-readable verdict. Monitor an Apify actor, API, or scraper for failures; check whether an API key silently failed; detect schema drift, stale…

💰 Paid API Permit Verdicts verification $0.0200 – $0.2500 $1.07 earned 30d

permitverdict.com · Permit Verdicts · wallet 0xe11d…dda5

Address-level building-permit intelligence. One call, one address returns normalized permit history, activity signals, and a decision-ready verdict with cited public records. Covers san francisco, sea…

💰 Paid API lazaretto.dev verification $0.0300/call $0.03 earned 30d

lazaretto.dev · wallet 0x428d…4da0

Deterministic pre-install malware verification for npm packages, AI agent skills, and MCP tools. Behavioral scan with file-and-line evidence for 0.03 USDC per call over x402 on Base, plus a free lockf…

💰 Paid API mcpscan.hergertsynthora.com verification $0.0500/call $0.44 earned 30d

mcpscan.hergertsynthora.com · wallet 0x1080…7de0

Scans an MCP server for security issues. Send a target URL or a pasted manifest; a deterministic rule engine checks embedded secrets, shell and filesystem capabilities, prompt injection surface and pe…

💰 Paid API businessrisk.hergertsynthora.com verification $0.0500/call $0.44 earned 30d

businessrisk.hergertsynthora.com · wallet 0x1080…7de0

Composite counterparty risk check: given an EVM wallet and/or a token contract, returns a weighted 0-100 risk score, a proceed, pivot or kill verdict, and reason codes, fusing sanctions screening, wal…

💰 Paid API nolawealthfinancial.com verification $0.1000/call

nolawealthfinancial.com

Signed x402 verification and screening primitives: claim notarization, resolver-graded verdicts, OFAC SDN screening, and validated corporate distress scoring, backed by an on-chain correctness bond.

💰 Paid API Norravex x402 Endpoint Audit verification $0.1000/call

norravex.com

Deterministic conformance and safety audit for public x402 HTTP 402 responses, with URL and payload modes, scored findings, and remediation.

💰 Paid API VirtualSMS verification $0.1000/call

virtualsms.io

Pay-per-call SMS verification and OTP receiving for AI agents - real carrier numbers across 145+ countries and 2500+ services, from $0.05 per code in USDC via x402, no account or API key. For signup t…

💰 Paid API HexScan verification $0.1000/call

hexscan.xyz

Smart contract risk triage API. Send a contract address, get a composite risk score (0-100) with honeypot detection, tax analysis, source verification, and heuristic findings. Not an audit.

💰 Paid API SYNTHORA Agent Pre-Trade Safety verification $0.2000/call $0.44 earned 30d

agentguard.hergertsynthora.com · wallet 0x1080…7de0

Returns a pre-trade risk verdict (SAFE, CAUTION or BLOCK) for an EVM address in one call, combining sanctions screening, stablecoin peg deviation in bps and a counterparty on-chain signal into an Ed25…

💰 Paid API Canu Verify verification $0.2900 – $5.0000

api.canuverify.com

Machine-first verification APIs for autonomous agents: deterministic MCP package security audits, isolated website and WebGL release QA, and structured invoice normalization or OCR verification with s…

💰 Paid API audit-tools.ai verification $1.0000/call

audit-tools.ai · wallet 0x95de…130d

Evaluate an Apify actor before you use it. Send one actor ID (for example apify/instagram-scraper) and get an evidence-backed quality report: 23 built-in criteria like reliability, 30-day failure rate…

💰 Paid API copperhead.lonestaroracle.xyz verification $2.0000/call $10.10 earned 30d

copperhead.lonestaroracle.xyz · wallet 0x52ab…6c06

Security audit for Move smart contracts on Aptos and Sui. Post Move source or a GitHub URL and get back a structured report with findings graded by severity.

💰 Paid API cottonmouth.lonestaroracle.xyz verification $2.0000/call $10.10 earned 30d

cottonmouth.lonestaroracle.xyz · wallet 0x52ab…6c06

POST /audit with Rust smart contract source or a GitHub URL and it returns an LLM generated security audit report, with per finding severity, description, proof of concept and fix. Covers CosmWasm, An…

💰 Paid API rattler.lonestaroracle.xyz verification $2.0000/call $10.10 earned 30d

rattler.lonestaroracle.xyz · wallet 0x52ab…6c06

Automated security audit for Solidity and EVM smart contracts, returning a Markdown report with findings by severity, proof of concept snippets and remediation notes. $2 USDC per call on Base or Solan…

💰 Paid API Vianerds Page Signal Audit verification $5.0000/call

vianerds.com

Deterministic pay-per-call audit for supplied static HTML. Returns a 0-100 launch-risk baseline with exact SEO, social sharing, accessibility and markup evidence plus prioritized fixes. The endpoint d…

💰 Paid API SYNTHORA Contract Guard verification $0.44 earned 30d

pay.hergertsynthora.com · wallet 0x1080…7de0

POST a Base contract address and receive a JSON safety verdict covering honeypot, rug pull, hidden mint and owner privileges, returned with an Ed25519 signature. One endpoint on the SYNTHORA agent ser…

💰 Paid API Audit a domain's email deliverability and sender reputation. Checks SPF, DKIM selectors, D verification $0.44 earned 30d

deliver.hergertsynthora.com · SYNTHORA · wallet 0x1080…7de0

Audit a domain's email deliverability and sender reputation. Checks SPF, DKIM selectors, DMARC policy strength (reject/quarantine/none), BIMI, MX and PTR records, returning a spam score and prioritize…

💰 Paid API Assess the security risk of a cross-chain bridge before routing funds through it. Combines verification $0.44 earned 30d

bridgerisk.hergertsynthora.com · SYNTHORA · wallet 0x1080…7de0

Assess the security risk of a cross-chain bridge before routing funds through it. Combines live DefiLlama TVL and audit status with the full bridge-hack incident history and known-exploit analysis int…

💰 Paid API SYNTHORA mtasts verification $0.44 earned 30d

mtasts.hergertsynthora.com · SYNTHORA · wallet 0x1080…7de0

SYNTHORA mtasts: sMTP transport-security audit: MTA-STS (RFC 8461) + TLS-RPT (RFC 8460). Resolves the policy DNS records, fetches and parses the well-known policy file, cross-validates the policy mx: …

💰 Paid API Screen a crypto wallet address against global sanctions and illicit-activity intelligence. verification $0.44 earned 30d

amlscreen.hergertsynthora.com · SYNTHORA · wallet 0x1080…7de0

Screen a crypto wallet address against global sanctions and illicit-activity intelligence. Cross-checks the on-chain Chainalysis sanctions oracle, TRM screening, OFAC SDN and GoPlus address flags (mix…

💰 Paid API German VAT Number Validator (SYNTHORA) verification

vat-validate.hergertsynthora.com · wallet 0x4a31…1377

Validates German (DE) VAT numbers offline using the check-digit algorithm and returns a JSON verdict. Other EU country formats are declined by the endpoint. $0.001 USDC per call on Base, with 3 free c…

💰 Paid API SYNTHORA BIC/SWIFT Check verification $0.44 earned 30d

biccheck.hergertsynthora.com · wallet 0x1080…7de0

Validates a BIC/SWIFT code (ISO 9362) from its structure: 8 or 11 character format, bank code, ISO 3166 country check, location and branch decode, live/test/passive flag. Structural check only, it doe…

💰 Paid API SYNTHORA contractwatch verification $0.44 earned 30d

contractwatch.hergertsynthora.com · SYNTHORA · wallet 0x1080…7de0

SYNTHORA contractwatch: verdict de seguridad de contrato on-chain que SI lee el bytecode (eth_getCode) y slots de proxy (EIP-1967/zeppelinos/UUPS/beacon), owner() y privilegios ocultos: honeypot, rug-…

💰 Paid API SYNTHORA x402 Endpoint Preflight verification $0.44 earned 30d

x402meta.hergertsynthora.com · wallet 0x1080…7de0

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 pay…

💰 Paid API Score the risk and reputation of any EVM wallet address before you transact with it. Combi verification $0.44 earned 30d

walletrep.hergertsynthora.com · SYNTHORA · wallet 0x1080…7de0

Score the risk and reputation of any EVM wallet address before you transact with it. Combines on-chain sanctions screening (Chainalysis oracle, TRM, OFAC) and GoPlus address-security flags (phishing, …

💰 Paid API SYNTHORA Pre-Sign Transaction Verdict verification $0.44 earned 30d

presign.hergertsynthora.com · wallet 0x1080…7de0

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 …

💰 Paid API SYNTHORA IBAN Check verification $0.44 earned 30d

ibancheck.hergertsynthora.com · wallet 0x1080…7de0

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 p…

💰 Paid API SYNTHORA Agent Capability Attestation verification $0.44 earned 30d

agentattest.hergertsynthora.com · wallet 0x1080…7de0

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 Ed…

💰 Paid API SYNTHORA Address Risk Screen verification $0.40 earned 30d

address-risk.hergertsynthora.com · wallet 0x15d3…1cc8

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 heade…

💰 Paid API LEI Lookup (GLEIF) verification $0.40 earned 30d

lei-lookup.hergertsynthora.com · wallet 0x15d3…1cc8

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…

💰 Paid API Data Quality Gate verification

www.aidatatools.dev · aidatatools

Deterministic post-scrape data cleaner and quality gate for AI agents. It repairs how data was ENCODED -- residual HTML tags and entities, mojibake ("Café" for "Café"), zero-width and invisible chara…