The short answer
210 of the 1,252 entries here are free to start or paid self serve, so one person can get API access without a contract. 168 of those also have an MCP server, which comes to 162 unique products and is the list that matters if you are building an agent alone rather than inside a company with a procurement department.
Two columns have to be true at once. The tool has to be callable, and you have to be able to get
in. This directory publishes both separately on purpose, because plenty of tools pass one test and
fail the other.
The arithmetic
- 78 entries are free to start: sign up, get a key, no conversation.
- 132 are paid self serve: a credit card is enough.
- Together, 210 of 1,252 entries, or
17%, pass the gate test.
- Cross that with the MCP column and 168 entries pass both. That intersection
is what this site calls solo reachable, and it is the number in the front page stat row.
- 79 are enterprise only and
8 enterprise leaning. Those are closed doors for one person.
- 949 do not publish enough for the gate to be established at all, and are
recorded as unknown rather than guessed.
Callable and reachable, both
162 unique products pass both tests. Here are the first fifteen in the published
order.
- Airbyte Official MCP · Free to start
Open-source/cloud ELT platform with 600+ connectors moving data from SaaS tools and databases into warehouses; increasingly positions itself as a... - Anymail Finder Official MCP · Free to start
Takes a name plus a company, domain, or LinkedIn URL, verifies the resulting work email against the mail server in real time, and only charges when... - Apideck Official MCP · Free to start
A unified API that normalises 200+ SaaS connectors into single data models, exposed as one MCP endpoint covering CRM, accounting, HRIS, ATS, file... - Apify Official MCP · Free to start
A cloud platform for running "Actors" (hosted scrapers and automation programs, thousands of them in a public store) that extract web data such as... - Attio Official MCP · Free to start
A CRM built around a flexible, user-defined data model (not fixed contact/company/deal objects) with real-time sync and an API-first architecture. - Autobound Official MCP · Free to start
Generates personalised outbound email copy and openers from live buyer signals, and sells the underlying signal data as an API and MCP feed. - Browserbase Official MCP · Free to start
A hosted headless-browser service (sessions, proxies, stealth, session recording) with Stagehand, its natural-language browser automation layer, so... - Buffer Official MCP · Free to start
A social-media scheduling and publishing tool covering channels, a posting queue, drafts, ideas and per-post analytics, with a remote MCP server that... - Cal.com Official MCP · Free to start
Open-source scheduling infrastructure - booking pages, event types, and a scheduling API/platform - offered both as a free, self-hostable open-source... - Calendly Official MCP · Free to start
Prospect-facing scheduling links and booking pages that let invitees book meetings directly onto a rep's calendar based on defined availability rules. - Cargo Official MCP · Free to start
A GTM/RevOps engineering platform (YC S23) that lets revenue teams define, version, and automate go-to-market logic - lead sourcing, enrichment,... - Census (now operates as "Fivetran Activations") Official MCP · Free to start
Was a standalone reverse-ETL tool for syncing warehouse data (Snowflake, BigQuery, etc.) into GTM tools like Salesforce/HubSpot without code; the... - Common Paper Official MCP · Free to start
Contract system built for startups - standardized, mutually-agreeable contract templates (MSAs, DPAs, order forms) plus a workflow/e-signature layer,... - Composio Official MCP · Free to start
A hosted integration/auth platform that lets AI agents and MCP clients call actions across 1,000+ SaaS apps (HubSpot, Slack, Gmail, GitHub, Notion,... - Crustdata Official MCP · Free to start
A real-time API for company and person firmographic/growth data (headcount trends, funding, tech stack, web traffic, social signals), positioned as...
147 more are on the linked page. The cut is the display limit, not a ranking.
The full solo reachable list is here, and the
78 free tiers are here.
What free does not mean
This directory tracks one thing about money: whether the door opens without a sales call. It does
not track prices, credit costs, quota sizes or rate limits, and none of them should be inferred from
anything on this page. Enrichment in particular is metered, and an agent in a loop can spend a
month's quota before lunch.
Sources
Every number on this page is generated from directory.json at build time and carries
the date it was baked: 2026-09-27. Nothing is typed by hand, nothing is rounded, and nothing is
estimated. The underlying data is published in full. Where the honest
answer is a zero, the zero is printed.
Related questions
In the directory