{"total":7,"protocols":{"x402":{"count":7,"description":"HTTP 402-based agent payments via stablecoin (USDC). Linux Foundation standard."},"stripe-mpp":{"count":1,"description":"Stripe Machine Payments Protocol. Supports stablecoin and fiat payments."},"both":{"count":1,"description":"Services supporting both x402 and Stripe MPP."}},"by_category":{"AI / ML":[{"vendor":"Brave Search API","category":"AI / ML","tier":"Free","description":"$5 in free credits every month, applied automatically. Brave's \"up to $20\" figure is $5 on each of four plans: Search, Answers, Spellcheck and Autosuggest. Search is $5 per 1,000 requests; Answers is $4 per 1,000 requests plus $5 per million tokens. Web search, news, videos, images, LLM context endpoints. 50 queries/sec. Credit card required. The earlier free plan (2,000 queries/mo) ended Feb 2026. The tools of Brave's MCP server include brave_web_search, brave_news_search, brave_image_search, brave_llm_context and brave_summarizer.","terms_superseded":null,"conditions":[{"text":"Keeping any data from the API is prohibited. Storing results or training an LLM requires an arrangement with Brave.","quote":"It is prohibited to retain any and all data received through the Brave Search API.","url":"https://api-dashboard.search.brave.com/documentation/resources/help-feedback","read_on":"2026-10-06"},{"text":"Once the free $5 and any bought credits are used up, requests are rejected until funds are added. Auto-reload is optional.","quote":"if you exhaust your prepaid balance your service will be paused — further API requests are rejected until you add more funds.","url":"https://api-dashboard.search.brave.com/documentation/resources/help-feedback","read_on":"2026-10-06"},{"text":"Unused free monthly credit does not carry over.","quote":"Free monthly credits are the exception — those are replaced each month rather than carried over.","url":"https://api-dashboard.search.brave.com/documentation/resources/help-feedback","read_on":"2026-10-06"},{"text":"Brave's Service Credit Terms say credits, bought or free, expire one year after they are issued or when the account closes, while its help page says bought credits do not expire.","quote":"Service Credits expire upon the earlier of one year from the date of issuance or the date that you close your account with us.","url":"https://api-dashboard.search.brave.com/terms-of-service/credit-terms","read_on":"2026-10-07"},{"text":"Bought credits are not refunded.","quote":"Purchases of Prepaid Service Credits are non-refundable.","url":"https://api-dashboard.search.brave.com/terms-of-service/credit-terms","read_on":"2026-10-07"},{"text":"Brave's February launch post says the $5 monthly credit requires attributing the Brave Search API on the project's website, while Brave's Terms of Use (updated September 1, 2026) make attribution optional. Brave's help page describes getting the credit with a card at signup and does not mention attribution.","quote":"Customer may provide attribution to Provider in the Customer Applications.","url":"https://api-dashboard.search.brave.com/terms-of-service","read_on":"2026-10-11"},{"text":"Brave keeps a record of search queries sent through an API account for up to 90 days for billing and troubleshooting. Zero data retention is available only for Enterprise customers.","quote":"A record of search queries submitted to the Brave Search API via a customer's Search API account is retained for a maximum of 90 days for the purpose of billing Search API account holders and for troubleshooting subject to Brave's legal obligations.","url":"https://api-dashboard.search.brave.com/documentation/resources/privacy-notice","read_on":"2026-10-11"}],"url":"https://brave.com/search/api/","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-search","example_cost":"$0.005","source_url":"https://search.agent.s.brave.app/llms.txt","source_quote":"A pay-per-request proxy in front of the Brave Search API. Each request carries a stablecoin micropayment, and the signed payment is the credential. No API key, no account, no signup. … x402 rail, USDC on Base … 5000 is the price of one search. … Prices are in base units of a six decimal token, so 5000 is $0.005.","read_on":"2026-10-07"}],"stability":"watch"},{"vendor":"Tavily AI","category":"AI / ML","tier":"Free","description":"Real-time web search API for AI agents, with search, extract, crawl and research endpoints. The free Researcher plan gives 1,000 API credits per month with no credit card required, resetting on the first of each month. A basic search costs 1 credit and an advanced search 2; extract costs 1 credit per 5 successful URLs (2 at advanced depth); research costs 4 to 250 credits per request. Search and Extract can also be called without an API key, free and rate-limited. Pay-as-you-go costs $0.008 per credit; the Project plan is $30 per month for 4,000 credits.","terms_superseded":null,"conditions":[{"text":"When monthly free credits are used up, requests stop until credits reset or the account upgrades. Pay-as-you-go charging applies if enabled.","quote":"If you exhaust your monthly credits, requests will stop until your credits reset or you upgrade to a paid plan.","url":"https://www.tavily.com/pricing","read_on":"2026-10-06"},{"text":"Production API keys need an active paid plan or pay-as-you-go enabled. Development keys are limited to 100 requests per minute, production keys 1,000.","quote":"Access to production keys requires either an active Paid Plan or PAYGO enabled.","rules_out":["production"],"url":"https://docs.tavily.com/documentation/rate-limits","read_on":"2026-10-10"},{"text":"Tavily may use your query data to improve its services; an account setting turns this off, and then query data is not stored or used for improvements.","quote":"At Tavily, you have the option to decide whether your query data is used to improve our services. You can change this setting anytime in your account settings.","url":"https://help.tavily.com/articles/4205958832-understanding-the-allow-use-of-query-data-setting","read_on":"2026-10-06"},{"text":"Tavily for Startups gives up to 100,000 API credits for 6 months to accepted startups: early-stage, VC-backed companies building AI agents or LLMs, typically pre-seed through Series A.","quote":"Who is eligible for Tavily for Startups? Early-stage, VC backed startups building AI agents or LLMs, typically pre-seed through Series A. What do I get if I am accepted? Up to 100k Tavily API credits for 6 months","url":"https://www.tavily.com/startups","read_on":"2026-10-16"},{"text":"Students get 4 months of the Project plan (4,000 API credits a month) free after verifying with a student email address or student ID.","quote":"Students can receive 4 months of free access to the Project Plan, which includes 4,000 API credits per month.","url":"https://help.tavily.com/articles/6606514713-student-account","read_on":"2026-10-16"}],"url":"https://www.tavily.com/pricing","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-search","example_cost":"$0.01 / call","source_url":"https://docs.tavily.com/documentation/machine-payments/x402","source_quote":"AI agents pay per request for Tavily Advanced Search in USDC on Base — no API key, no account, no human in the loop. … POST /search | advanced | $0.01 / call","read_on":"2026-10-07"}],"stability":"stable"},{"vendor":"Exa","category":"AI / ML","tier":"Free","description":"Web search API for AI agents with Search, Contents, Answer, Monitors and Agent endpoints. The free tier gives $10 in credits each month, up to 2,500 Lite searches, resetting on the first of the month without rollover, plus a one-time $10 onboarding bonus; no payment method required. Only a user's first team gets the free credits. Free teams get 10 QPS on search. Search costs $4 per 1,000 requests with up to 10 results for Lite, $7 for Auto, and $12 for Deep. Contents costs $1 per 1,000 pages per content type. Since October 19, 2026, Instant, Fast and Deep Reasoning are legacy search types that keep working at their current prices. Exa recommends Lite in place of Instant and Fast. Search and Contents can also be paid per request over x402 in USDC on Base or Solana, with no API key.","terms_superseded":null,"conditions":[{"text":"When a team's credits run out, requests return 402 Payment Required. Auto recharge is optional.","quote":"If your team exhausts its credits, requests return 402 Payment Required.","url":"https://exa.ai/docs/admin/billing","read_on":"2026-10-06"},{"text":"Exa uses anonymized data on default plans to improve its models. Zero Data Retention is available only on Enterprise plans.","quote":"On default plans, we use anonymized data to make our models more accurate and useful over time.","url":"https://trust.exa.ai/faq","read_on":"2026-10-06"}],"url":"https://exa.ai/docs/admin/pricing","payment_protocols":[{"protocol":"x402","chain":"Base or Solana","settlement":"USDC","pricing_model":"per-request","example_cost":"$0.007 / request","source_url":"https://exa.ai/docs/integrations/payments/x402/quickstart","source_quote":"Pay per request with USDC on Base or Solana via the x402 protocol. … auto, fast | $0.007 / request","read_on":"2026-10-07"}],"stability":"volatile"}],"Browser Automation":[{"vendor":"Browserbase","category":"Browser Automation","tier":"Free","description":"Headless browser infrastructure — Free Plan $0/mo Get started with Browserbase. Explore and prototype ideas. 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Headless Chrome instances with full browser automation, screenshot capture, and page interaction. Built for agent workflows.","terms_superseded":null,"url":"https://hyperbrowser.ai","payment_protocols":[{"protocol":"x402","chain":"Base or Solana","settlement":"USDC","pricing_model":"per-hour","example_cost":"$0.10 per hour","source_url":"https://www.hyperbrowser.ai/docs/integrations/x402/sessions","source_quote":"Purchase a browser session for $0.10 per hour using your wallet. … It supports both EVM and Solana wallets.","read_on":"2026-10-07"}],"stability":null}],"Storage":[{"vendor":"Pinata IPFS","category":"Storage","tier":"Free","description":"Pinata is the simplest way to upload and manage files on IPFS. Our friendly user interface and IPFS API make Pinata the easiest IPFS pinning service for platforms, creators, and collectors. 1 GB storage free, along with access to API.","terms_superseded":{"change_date":"2026-08-28","change_type":"limits_reduced","summary":"The free tier now offers 500 pinned files, 1GB storage, 1 gateway, 10GB bandwidth per month, and 10k requests per month.","reading":{"date":"2026-08-28","url":"https://pinata.cloud","label":"pinata.cloud","terms":"500 Pinned Files Total 1GB Storage Total 1 Gateway Total 10G Bandwidth Per month 10k Requests Per month"},"notice":"As of 2026-08-28, pinata.cloud reads: 500 Pinned Files Total 1GB Storage Total 1 Gateway Total 10G Bandwidth Per month 10k Requests Per month. We are not publishing our stored Pinata IPFS terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones."},"url":"https://pinata.cloud/pricing","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-upload","example_cost":"$0.10/GB * 12","source_url":"https://docs.pinata.cloud/api-reference/endpoint/x402/pin","source_quote":"Uploads a file to Pinata's public IPFS network … $0.10/GB * 12 | Pins for 12 months","read_on":"2026-10-07"},{"protocol":"stripe-mpp","chain":"Tempo","settlement":"USDC","pricing_model":"per-upload","example_cost":"fileSize (GB) x $0.10 x 12 months, minimum $0.01 USDC","source_url":"https://docs.pinata.cloud/files/mpp/overview","source_quote":"No API key or Pinata account required — just pay with USDC on Tempo and get your files stored on IPFS. … Pricing: fileSize (GB) x $0.10 x 12 months, minimum $0.01 USDC","read_on":"2026-10-07"}],"stability":null}],"Dev Utilities":[{"vendor":"Strale","category":"Dev Utilities","tier":"Pay-per-use","description":"Business data APIs for AI agents: 298+ capabilities across 25 countries by Strale's count (read 2026-10-07), including IBAN validation, VAT lookup, sanctions screening and company data. Callable over MCP, A2A or REST with an API key, or per call over x402 in USDC on Base with no API key or signup.","terms_superseded":null,"url":"https://api.strale.io/llms.txt","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-request","source_url":"https://api.strale.io/llms.txt","source_quote":"Strale provides business data capabilities that AI agents can use at runtime via MCP, A2A, REST API, or x402 micropayments. … Pay with USDC on Base","read_on":"2026-10-07"}],"stability":null}]},"services":[{"vendor":"Browserbase","category":"Browser Automation","tier":"Free","description":"Headless browser infrastructure — Free Plan $0/mo Get started with Browserbase. Explore and prototype ideas. Infrastructure 3 concurrent browsers 1 browser hour 3 Agent runs included 1,000 Search calls 1,000 Fetch calls 15 minutes /session Capabilities 7 days data retention Models $5 in tokens Runtime included Start for free","terms_superseded":null,"url":"https://www.browserbase.com/pricing","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-hour","example_cost":"$0.12/hour","source_url":"https://docs.browserbase.com/integrations/x402/introduction","source_quote":"Built on the x402 protocol, this integration lets you create and manage Browserbase sessions by paying with USDC on Base, with no API keys or accounts required. … Rate: $0.12/hour","read_on":"2026-10-07"}],"stability":"improving"},{"vendor":"Brave Search API","category":"AI / ML","tier":"Free","description":"$5 in free credits every month, applied automatically. Brave's \"up to $20\" figure is $5 on each of four plans: Search, Answers, Spellcheck and Autosuggest. Search is $5 per 1,000 requests; Answers is $4 per 1,000 requests plus $5 per million tokens. Web search, news, videos, images, LLM context endpoints. 50 queries/sec. Credit card required. The earlier free plan (2,000 queries/mo) ended Feb 2026. The tools of Brave's MCP server include brave_web_search, brave_news_search, brave_image_search, brave_llm_context and brave_summarizer.","terms_superseded":null,"conditions":[{"text":"Keeping any data from the API is prohibited. Storing results or training an LLM requires an arrangement with Brave.","quote":"It is prohibited to retain any and all data received through the Brave Search API.","url":"https://api-dashboard.search.brave.com/documentation/resources/help-feedback","read_on":"2026-10-06"},{"text":"Once the free $5 and any bought credits are used up, requests are rejected until funds are added. Auto-reload is optional.","quote":"if you exhaust your prepaid balance your service will be paused — further API requests are rejected until you add more funds.","url":"https://api-dashboard.search.brave.com/documentation/resources/help-feedback","read_on":"2026-10-06"},{"text":"Unused free monthly credit does not carry over.","quote":"Free monthly credits are the exception — those are replaced each month rather than carried over.","url":"https://api-dashboard.search.brave.com/documentation/resources/help-feedback","read_on":"2026-10-06"},{"text":"Brave's Service Credit Terms say credits, bought or free, expire one year after they are issued or when the account closes, while its help page says bought credits do not expire.","quote":"Service Credits expire upon the earlier of one year from the date of issuance or the date that you close your account with us.","url":"https://api-dashboard.search.brave.com/terms-of-service/credit-terms","read_on":"2026-10-07"},{"text":"Bought credits are not refunded.","quote":"Purchases of Prepaid Service Credits are non-refundable.","url":"https://api-dashboard.search.brave.com/terms-of-service/credit-terms","read_on":"2026-10-07"},{"text":"Brave's February launch post says the $5 monthly credit requires attributing the Brave Search API on the project's website, while Brave's Terms of Use (updated September 1, 2026) make attribution optional. Brave's help page describes getting the credit with a card at signup and does not mention attribution.","quote":"Customer may provide attribution to Provider in the Customer Applications.","url":"https://api-dashboard.search.brave.com/terms-of-service","read_on":"2026-10-11"},{"text":"Brave keeps a record of search queries sent through an API account for up to 90 days for billing and troubleshooting. Zero data retention is available only for Enterprise customers.","quote":"A record of search queries submitted to the Brave Search API via a customer's Search API account is retained for a maximum of 90 days for the purpose of billing Search API account holders and for troubleshooting subject to Brave's legal obligations.","url":"https://api-dashboard.search.brave.com/documentation/resources/privacy-notice","read_on":"2026-10-11"}],"url":"https://brave.com/search/api/","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-search","example_cost":"$0.005","source_url":"https://search.agent.s.brave.app/llms.txt","source_quote":"A pay-per-request proxy in front of the Brave Search API. Each request carries a stablecoin micropayment, and the signed payment is the credential. No API key, no account, no signup. … x402 rail, USDC on Base … 5000 is the price of one search. … Prices are in base units of a six decimal token, so 5000 is $0.005.","read_on":"2026-10-07"}],"stability":"watch"},{"vendor":"Tavily AI","category":"AI / ML","tier":"Free","description":"Real-time web search API for AI agents, with search, extract, crawl and research endpoints. The free Researcher plan gives 1,000 API credits per month with no credit card required, resetting on the first of each month. A basic search costs 1 credit and an advanced search 2; extract costs 1 credit per 5 successful URLs (2 at advanced depth); research costs 4 to 250 credits per request. Search and Extract can also be called without an API key, free and rate-limited. Pay-as-you-go costs $0.008 per credit; the Project plan is $30 per month for 4,000 credits.","terms_superseded":null,"conditions":[{"text":"When monthly free credits are used up, requests stop until credits reset or the account upgrades. Pay-as-you-go charging applies if enabled.","quote":"If you exhaust your monthly credits, requests will stop until your credits reset or you upgrade to a paid plan.","url":"https://www.tavily.com/pricing","read_on":"2026-10-06"},{"text":"Production API keys need an active paid plan or pay-as-you-go enabled. Development keys are limited to 100 requests per minute, production keys 1,000.","quote":"Access to production keys requires either an active Paid Plan or PAYGO enabled.","rules_out":["production"],"url":"https://docs.tavily.com/documentation/rate-limits","read_on":"2026-10-10"},{"text":"Tavily may use your query data to improve its services; an account setting turns this off, and then query data is not stored or used for improvements.","quote":"At Tavily, you have the option to decide whether your query data is used to improve our services. You can change this setting anytime in your account settings.","url":"https://help.tavily.com/articles/4205958832-understanding-the-allow-use-of-query-data-setting","read_on":"2026-10-06"},{"text":"Tavily for Startups gives up to 100,000 API credits for 6 months to accepted startups: early-stage, VC-backed companies building AI agents or LLMs, typically pre-seed through Series A.","quote":"Who is eligible for Tavily for Startups? Early-stage, VC backed startups building AI agents or LLMs, typically pre-seed through Series A. What do I get if I am accepted? Up to 100k Tavily API credits for 6 months","url":"https://www.tavily.com/startups","read_on":"2026-10-16"},{"text":"Students get 4 months of the Project plan (4,000 API credits a month) free after verifying with a student email address or student ID.","quote":"Students can receive 4 months of free access to the Project Plan, which includes 4,000 API credits per month.","url":"https://help.tavily.com/articles/6606514713-student-account","read_on":"2026-10-16"}],"url":"https://www.tavily.com/pricing","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-search","example_cost":"$0.01 / call","source_url":"https://docs.tavily.com/documentation/machine-payments/x402","source_quote":"AI agents pay per request for Tavily Advanced Search in USDC on Base — no API key, no account, no human in the loop. … POST /search | advanced | $0.01 / call","read_on":"2026-10-07"}],"stability":"stable"},{"vendor":"Pinata IPFS","category":"Storage","tier":"Free","description":"Pinata is the simplest way to upload and manage files on IPFS. 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Auto recharge is optional.","quote":"If your team exhausts its credits, requests return 402 Payment Required.","url":"https://exa.ai/docs/admin/billing","read_on":"2026-10-06"},{"text":"Exa uses anonymized data on default plans to improve its models. 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Callable over MCP, A2A or REST with an API key, or per call over x402 in USDC on Base with no API key or signup.","terms_superseded":null,"url":"https://api.strale.io/llms.txt","payment_protocols":[{"protocol":"x402","chain":"Base","settlement":"USDC","pricing_model":"per-request","source_url":"https://api.strale.io/llms.txt","source_quote":"Strale provides business data capabilities that AI agents can use at runtime via MCP, A2A, REST API, or x402 micropayments. … Pay with USDC on Base","read_on":"2026-10-07"}],"stability":null}]}