"Free APIs and services without commercial fees" matching MCP tools:

• run_knockout_searchA

  GleanMark USPTO Trademark SearchA

  Runs a scored trademark conflict (knockout) search over 14M USPTO records with the same engine as the GleanMark app: exact, phonetic, trigram and component-word matching, coordinated class expansion, foreign-equivalent translation and design codes, scored for mark similarity and commercial overlap. Returns results grouped into four risk tiers (very high, high, medium, low) with confusion scores, a four-level headline verdict (critical conflicts, elevated risk, moderate risk, low risk) with a one-line reason, and a sample of dead marks in the same naming territory. goods_description, when supplied, is scored for goods and services relatedness; without it, scoring uses classes only, which understates conflicts between related goods in different classes. owner_name adds the applicant's existing marks in the searched classes. It searches trademarks only, not domains or web use; check_brand_availability covers domains. Most searches finish in under a minute. Requires a signed-in GleanMark account.

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• sonic_blockA

  Agent Data Tools: Chain dataA

  Latest block number and block details on Sonic, or any block by decimal number: hash, timestamp, transaction count, gas used and limit, base fee in gwei and producer. Use for timestamps and confirmation counts; for current fees use sonic_gas. A block that does not exist yet returns 404, uncharged. Example: number=latest. Price $0.01/call via x402 USDC or a card key (/credits), first 25 free; failed calls free. Reads or computes only and changes nothing; each call is charged, so repeats are not free.

  ConnectorNo auth

• sonic_blockA

  Agent Data Tools: Chain dataA

  Latest block number and block details on Sonic, or any block by decimal number: hash, timestamp, transaction count, gas used and limit, base fee in gwei and producer. Use for timestamps and confirmation counts; for current fees use sonic_gas. A block that does not exist yet returns 404, uncharged. Example: number=latest. Price $0.01/call via x402 USDC or a card key (/credits), first 25 free; failed calls free. Reads or computes only and changes nothing; each call is charged, so repeats are not free.

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• interpret_commercial_changeA

  project-little-weirdoA

  SEMANTIC INTERPRETATION over PRICING AND COMMERCIAL-OFFER PAGES ONLY. Requires a target that already has two persisted observations with a deterministic CONTENT_CHANGED verdict; it never refetches the page and never decides whether a change occurred. Input: targetId (returned by observe_public_page), optionally fromObservationId/toObservationId. Returns classified commercial changes (price, plan, discount, availability, packaging...) where every claim quotes observed before/after text, plus rejected claims and their rejection reasons. Uncertainty: unsupported, immaterial, numerically inconsistent or low-confidence claims are discarded. Non-commercial pages return INSUFFICIENT_EVIDENCE with no changes. There is no guarantee that a page contains commercial intelligence. Cost: free beta, model-backed and separately rate limited per credential.

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• gas_priceA

  Sausage OnchainA

  Bid-ready EIP-1559 fees (slow/standard/fast maxFeePerGas + maxPriorityFeePerGas, tx-ready wei) for one chain, read live from public RPCs. Pass tx_type to get the USD cost of that specific transaction instead, including the OP-stack L1 data fee naive estimators miss. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

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• charge_to_netA

  Moltline Merchant MathA

  Compute the gross price to charge so you net a target after fees. FREE. 'Charge X to receive Y' after percentage + fixed processor fees. Typical input {"net_target": 100, "pct_fee": 2.9, "fixed_fee": 0.30} returns {"charge": 103.4, "fee": 3.4, "net": 100.0}. The inverse of processor_fees - solves for gross from a target net. Use when the payout is the fixed requirement. Not when the price is already set. Errors: on invalid, missing, or malformed input this tool never raises a protocol error; it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "net_target > 0 and pct_fee < 100 required"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

  ConnectorNo auth

• gas_priceA

  Professor Sausages — On-chainA

  Bid-ready EIP-1559 fees (slow/standard/fast maxFeePerGas + maxPriorityFeePerGas, tx-ready wei) for one chain, read live from public RPCs. Pass tx_type to get the USD cost of that specific transaction instead, including the OP-stack L1 data fee naive estimators miss. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  ConnectorNo auth

• charge_to_netA

  Moltline Merchant MathsA

  Compute the gross price to charge so you net a target after fees. FREE. 'Charge X to receive Y' after percentage + fixed processor fees. Typical input {"net_target": 100, "pct_fee": 2.9, "fixed_fee": 0.30} returns {"charge": 103.4, "fee": 3.4, "net": 100.0}. The inverse of processor_fees - solves for gross from a target net. Use when the payout is the fixed requirement. Not when the price is already set. Errors: on invalid, missing, or malformed input this tool never raises a protocol error; it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "net_target > 0 and pct_fee < 100 required"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

  ConnectorNo auth

• quote_routeA

  402 DispatcherA

  FREE. Rank Bazaar APIs for a natural-language task without paying. Prefer over search_bazaar when you need ranked candidates (economy=cheapest; verified=reliability score). Prefer over list_discovered_apis when matching a task, not dumping the cache. Use route_and_call next to execute; do not use this to pay.

  ConnectorNo auth

• watch_service_statusA

  MockbirdA

  Subscribe to down/recovered alerts for any of the public mock/testing APIs tracked by check_api_status (httpbin, JSONPlaceholder, ReqRes, FakeStoreAPI, DummyJSON …). action:"subscribe" {service, notify?}: service is an id from check_api_status (or "*" for all tracked services). With notify, that webhook gets one message when the service goes down and one when it recovers (debounced across two consecutive hourly checks — blips never fire; a confirmation message is delivered immediately so you can see the wiring works). WITHOUT notify you get a pollable subscription instead — no webhook needed. Returns {id, secret} — store both. action:"poll" {id, secret}: (webhook-less watches) returns the down/recovered transitions since your last poll — empty events = nothing changed; checks run hourly so polling more often sees nothing new. action:"info" {id, secret}: subscription state. action:"unsubscribe" {id, secret}: stop alerts. notify formats: Slack/Discord webhooks get native payloads; anything else gets HMAC-signed JSON. Limits: 5 live watches per IP — deleting one frees the slot immediately. To watch YOUR OWN URL instead, use uptime_monitor.

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• enquiry_describeA

  siteA

  Read first. States plainly what submit_enquiry does on Commercial Laundry Cost: it starts an enquiry with human providers who quote directly. Nothing is bought, ordered or paid; no quote is guaranteed; it is free. Also returns who receives the details, the consent wording, and how the person confirms.

  ConnectorNo auth

• recommend_stackA

  Crosswire - payment infrastructure pricing, coverage and stack designA

  Call this whenever the user asks which Crosswire products or rails fit their setup, and price is not the question. Use ONLY when the user asks which Crosswire products/rails fit their setup - not price. Accepts either a free-text `description` of the business (preferred) or structured `vertical` + `needs`; every supplied input is read, echoed back in `fields`, and never asked for again. Returns a recommended combination of rails with a short rationale, each rail carrying the need or cue it was derived from. Does NOT return pricing, rates, bps, fees, savings, or any commercial number. For any price/rate/cost/fee question, use `get_indicative_price` instead. Sensitive verticals (forex, adult) return a consult, never a firm stack. When EU and US movement are both in scope, the response also carries the real-time EUR <-> USD settlement corridor. Rails are described at capability level only - no provider, bank, acquirer or network is ever named.

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• get_pricingA

  WattCoinA

  WattCoin: How to pay for WATT services: live per-service prices (WATT only), the payment wallet, the pay-per-use flow, the free scrape tier and whether the LLM service is currently available. Use before web_scrape or before paying for anything; use get_watt_token_info for market data. No auth needed; read-only and live. Returns JSON.

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• list_benefitsA

  BLIA — Bank Product TermsA

  Use this when the user asks which accounts include a perk or benefit -- a credit card annual fee rebate, a safe deposit box, free drafts or cheques, rewards points, a borrowing rate discount. With benefit set, returns includes / does_not_include / not_recorded across products; without it, every tracked benefit per product. not_recorded is unknown, never 'not included'. A benefit with basis 'bank_default' is the bank's standard terms for all accounts (no product-specific benefit recorded): say so rather than calling it a feature of the plan. An unknown benefit name returns an error listing the benefits BLIA tracks. Ongoing perks only; welcome offers are in list_offers, and fees and waiver rules in get_product_terms.

  ConnectorNo auth

• compare_usdt_networksA

  TronOrb — TRON analyticsA

  Compare USDT across TRON, Ethereum, BNB Chain, Polygon and Solana: USDT supply on each network, live cost of one USDT transfer in USD (TRON: TRX burned without energy), extra cost for a first-time recipient, and block time. Use it when the user asks which network is cheapest or compares TRC-20 with ERC-20/BEP-20; for a detailed TRON-only breakdown (with and without energy) use get_usdt_fee. Returns one row per network. Fees refresh every few minutes; supply daily.

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• zksync_blockA

  Agent Data Tools: Chain dataA

  Latest block number and block details on zkSync Era, or any block by decimal number: hash, timestamp, transaction count, gas used and limit, base fee in gwei and producer. Use for timestamps and confirmation counts; for current fees use zksync_gas. A block that does not exist yet returns 404, uncharged. Example: number=latest. Price $0.01/call via x402 USDC or a card key (/credits), first 25 free; failed calls free. Reads or computes only and changes nothing; each call is charged, so repeats are not free.

  ConnectorNo auth

• zksync_blockA

  Agent Data Tools: Chain dataA

  Latest block number and block details on zkSync Era, or any block by decimal number: hash, timestamp, transaction count, gas used and limit, base fee in gwei and producer. Use for timestamps and confirmation counts; for current fees use zksync_gas. A block that does not exist yet returns 404, uncharged. Example: number=latest. Price $0.01/call via x402 USDC or a card key (/credits), first 25 free; failed calls free. Reads or computes only and changes nothing; each call is charged, so repeats are not free.

  ConnectorNo auth

• get_pricing_and_limitsA

  Electronic Invoice APIA

  Explain the plans, monthly quotas, rate limits, concurrency limits, billable status codes and body size limits of the Electronic Invoice API. Works without an API key and does not call the API. B2B only. Prices and monthly quotas are published on https://electronic-invoice.app/de/api/. Use this for commercial or quota questions, not for invoice validation.

  ConnectorNo auth

• list_booking_servicesA

  Vila BuarqueA

  List a venue's services — what it offers, with price and duration. Pass `place_slug` (from search_places) to list the services of a specific VENUE — a salon, clinic or studio listed in this directory; that is what you want in almost every case, and it is the only form whose serviceId works with create_booking. Omitting `place_slug` lists the directory site's own services instead, which most sites do not have. Returns name, description, price, duration in minutes, and `bookableViaMcp`. Services are listed for EVERY venue, including those with no online booking system — check `bookableViaMcp`: when it is false, `id` is null and you cannot book through create_booking, so point the user at `bookingUrl` or the venue's page instead.

  ConnectorNo auth

• list_planned_servicesA

  Sats4AI - Bitcoin-Powered AI ToolsA

  List all planned services with current vote counts. Returns JSON array: [{ slug, name, description, votes }], sorted by votes descending. No payment required — this is a free discovery tool. Use the slug values with vote_on_service to cast votes. This tool is idempotent and safe to call repeatedly.

  ConnectorNo auth

• list_booking_servicesA

  Bela VistaA

  List a venue's services — what it offers, with price and duration. Pass `place_slug` (from search_places) to list the services of a specific VENUE — a salon, clinic or studio listed in this directory; that is what you want in almost every case, and it is the only form whose serviceId works with create_booking. Omitting `place_slug` lists the directory site's own services instead, which most sites do not have. Returns name, description, price, duration in minutes, and `bookableViaMcp`. Services are listed for EVERY venue, including those with no online booking system — check `bookableViaMcp`: when it is false, `id` is null and you cannot book through create_booking, so point the user at `bookingUrl` or the venue's page instead.

  ConnectorNo auth