An API access gate is what a vendor makes you do before you can get programmatic access. Free to start means you sign up and get a key. Paid self serve means you pay and get a key. Enterprise only means a contract, a seat count or a procurement cycle, which for one person with an agent is a closed door.
This is the second column nobody else publishes, and in practice it decides more than the feature list does. A tool with a magnificent API you cannot get into is worth exactly as much to your agent as a tool with no API.
| Gate | Entries | What it means for one person with an agent |
|---|---|---|
| Free to start | 57 | Sign up, get a key, start calling. No conversation with anybody. |
| Paid, self serve | 101 | A credit card is enough. Still no sales call. |
| Enterprise leaning | 1 | Self serve on paper, gated in practice. |
| Enterprise only | 45 | Contract, seat minimum or procurement. A solo operator is out. |
| Unknown | 83 | The gate could not be established from public sources and is published as unknown rather than guessed. |
6 further entries record n/a, where an API gate is not a meaningful question. Counted 2026-08-25 across 293 entries.
83 entries carry an unknown gate, and that is itself the finding. A vendor who does not publish whether you can buy API access, at what tier, is telling you something about how they expect you to buy. Unknown is a legal answer in this directory and it ships as unknown rather than being rounded into whichever bucket looks tidier.
MCP status and access gate are separate columns for a reason. 22 entries ship an official MCP server behind an enterprise gate. The server is real, the protocol works, and most people reading this cannot call it. The 117 solo reachable entries are the list that matters if you are one person and a credit card.
Every number on this page is generated from directory.json at build time and carries the date it was baked: 2026-08-25. 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.