AgentGatePay
x402
Real-world tasks your agent can't do alone.
Which is more popular?
Based on our record, FastAPI seems to be a lot more popular than Underscore Done. While we know about 316 links to FastAPI, we've tracked only 1 mention of Underscore Done.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | underscoredone.com | fastapi.tiangolo.com |
| Pricing | ||
| Company | Startup from the United States · 2026 | Startup from Colombia |
| Listed in |
In their own words, as submitted to SaaSHub.
Underscore Done (_done) is a suite of pay-per-call utility APIs built for AI agents. No API keys, no subscriptions - agents pay per request with USDC via the x402 protocol
No description of FastAPI yet.
What each product offers, as listed by its team.
No features have been listed yet.
Possible disadvantages
An editorial look at what each product does well and who it suits.
No analysis of Underscore Done yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
No Underscore Done videos yet. You could help us improve this page by suggesting one.
FastAPI from the ground up
More videos
How often each product is chosen within a category, 0–100% relative to the other.
As answered by people managing Underscore Done and FastAPI.
Underscore Done's answer
We provide data and actions that AI cannot achieve.
Also we don't require accounts, registration, api keys. And we charge per usage and never charge monthly subscriptions.
Underscore Done's answer
Ai Agents that work on behalf of people.
Share your experience with using Underscore Done and FastAPI. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.
We have no reviews of Underscore Done yet. Be the first one to post
When our backend team needs to build services for data parsing, aggregators, or high-load APIs, FastAPI is our absolute go-to choice. It completely lives up to its name-development speed is outstanding. The...
FastAPI, as the name hints, is a swift mover. Built on Starlette, it’s all about speed and performance with Python. Crafting API masterpieces at the speed of light, now that’s something.
Since its release in 2018, it has rapidly gained popularity due to its great performance and simplicity. In fact, according to PyPi Stats, FastAPI has over 9 million monthly downloads, surpassing even full-stack...
Recommendations tracked on public social media and blogs since March 2021.
_done is a catalog of small, pay-per-call utility APIs aimed at AI agents: things like DNS and WHOIS lookups, screenshots, OCR, hashing, QR codes, and SEO extraction. Every call costs one cent in USDC over x402. There's no account and no... - Source: dev.to / about 1 month ago
Under the hood it's Flutter on the client and FastAPI with PostgreSQL on the server. WebSockets for realtime, WebRTC for calls, object storage for media, and small services for speech and translation. Android, iOS, Windows and Linux. The... - Source: dev.to / 10 days ago
Using FastAPI, FastStream, and dishka lets us follow Clean Architecture principles and almost avoid leaky abstractions. The prototype also used Pydantic and SQLAlchemy. I do not focus on them because these technologies are already... - Source: dev.to / 18 days ago
If your FastAPI app talks to a database through SQLAlchemy, chances are high you will meet it sooner or later. Not on your machine, of course. It shows up in production, after a few quiet hours, under load. And the reflex is always the... - Source: dev.to / 24 days ago
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