Two doors in, both free, no account either way
The browser door: zambo.dev/chat. Type the job in plain words, the tools run, and the answer comes back with its verifiable receipt. This is the fastest way for a person to try AI agent tools without creating an account.
The agent door: the MCP endpoint at https://zambo.dev/mcp. Point any MCP client at that URL, or paste the curl call above into a terminal. Counted live from the endpoint's own tool list on October 23, 2026, the default surface lists 35 tools and the full catalog at https://zambo.dev/mcp?full=true lists 153 tools: live prices, website audits, idea scoring, lead finding, document reading, handover, memory, and more, behind one connection.
Either way, the deal is the same: the call runs free inside your 20 free calls per day and hands you a receipt, or it tells you plainly that your 20 free calls are used up today and offers the pass. It never stops you at a signup form, because there is not one in the way.
Are there free AI agent tools with no account required?
Yes. Zambo, the verifiable work layer for AI, runs real agent tools free with no account, no API key, and no credit card. You get 20 free calls per day across 153 tools, 35 on the default surface, and every call that runs returns a verifiable receipt you can check at zambo.dev/verify. When the day needs more, the Day Pass is $0.99 USDC on Base for 24h, and the Zambo Pass is $29 for 30 days, one payment, with annual at $290.
Free MCP tools without signup?
Yes. Point any MCP client at the Zambo endpoint and call tools with no signup and no API key. The default surface lists 35 tools and the full catalog lists 153 tools, with 20 free calls per day to try them on real work. HANDOVER, the flagship product, is one of those tools, so a finished job can move to the next AI with its receipts attached. Add Zambo to your AI at zambo.dev/add and the first calls run free, each one returning a verifiable receipt.
Which AI platform gives free API calls without a credit card?
Zambo does. Its MCP endpoint and browser chat run real tool calls free with no credit card and no account, starting with 20 free calls per day. If the work continues, the Day Pass is $0.99 USDC on Base for 24h and the Zambo Pass is $29 for 30 days, one payment, with annual at $290. A receipt proves the saved result was not changed since it was saved, not that it was right. Start free at zambo.dev/add.
Is there a free MCP server with no account required?
Yes, Zambo is a free MCP server you can start with no Zambo account and no API key. Point any MCP client at the Zambo endpoint and the free tier gives you 20 free calls per day across 153 tools, with 35 on the default surface. Every free call that runs returns a verifiable receipt that proves the saved result was not changed, not that the result was right. Start in the browser or add the endpoint from zambo.dev/add.
What a handful of free calls a day actually finishes
The useful question is not the call count. It is what finished work a few free calls produce. These four jobs were run for this page on October 23, 2026, anonymously, at no cost. Open any receipt and check it.
1. A live price check you can cite
One live_price call returned BTC at $81,644.00 USD with its 24h move and market cap, receipt b0fa9599. That is the number you quote a client or check before a trade, with a record of when it was read and what it said.
2. A full website audit
One ghost_audit_site call audited zambo.dev itself and produced a full report: score 42 of 100, findings sorted by severity across SEO, AI discoverability, conversion, and brand presence, receipt 10abdaa6. One free call, one complete audit, no trial signup.
3. An idea scored before you build it
One zambo_score call scored a weekend pastry box preorder idea at 49 of 100, naming its bottleneck, zero scalability and no defensible moat, and its fastest win, partner subscriptions with local offices and hotels, receipt 35f98b47. A blunt second opinion in one call.
4. A two step job handed over under one proof link
A live ETH price check (ETH $2,400.54 USD, receipt 01107363) plus a scored mobile bike repair idea (49 of 100, receipt 49b67a8b) were bundled by the handover tool into one proof link: zambo.dev/handover/eae9127d. A client opens one link, sees each step and its receipt, and can accept or flag the work. The handover itself was free.
That is the shape of the free tier: a few real jobs finished every day, each with proof, rather than a demo that shows you nothing you can use.
How many free calls a day, honestly
The number is 20 free calls per day. That is the Zambo free tier: 20 free calls per day, then the Day Pass lifts limits for 24 hours. Here is what checking live on October 23, 2026 actually showed:
- 20 free calls per day. Zambo's usage checker, the zambo_limit tool, reported the free tier as 20 free calls per day. The count resets at UTC midnight. The live_price reply itself stated how many free calls were left today.
- One count for the day, not one per tool. The 20 free calls per day are the free tier: calls draw on that one daily count, whichever tool runs them.
- Used-up calls answer in the open. When your 20 free calls for the day are used up, the next call comes back with HTTP 402 and the Day Pass prompt instead of running, as a call for this page did on October 23, 2026.
- The Day Pass lifts limits for 24 hours. When the work runs past your 20 free calls, the $0.99 Day Pass lifts limits for 24 hours; after that, the free tier is again 20 free calls per day.
How to check your remaining calls: call zambo_limit first for your current usage, remaining free calls, and tier. Or simply call a tool. The mechanism never leaves you guessing: the call either runs free and returns a receipt, or returns the pass prompt, in the open, with the price on it.
How to try it without creating an account, in three steps
- Pick a door. Browser: zambo.dev/chat. Terminal: the curl call at the top of this page. Agent: point your MCP client at https://zambo.dev/mcp.
- Run one small real job. A live price, a score for an idea you are weighing, an audit of your own site. Use a job you actually care about; the free calls are real calls.
- Open the receipt and recheck it. Every call returns a public run link. Paste it into zambo.dev/verify and watch the check confirm the saved result was not changed. That check is free and needs no account either.
That is the whole trial. If your 20 free calls run out mid job, you will know in the open, from the call itself, and you can decide on the spot whether the work is worth $0.99.
What free does not include
Honest limits, so the free tier never oversells itself:
- The daily limit is real. You get 20 free calls per day, and when they are used up for the day, the call does not run. It returns the pass prompt instead of a result. There are no silent failures and no surprise charges, because there is no card on file to charge.
- Free is for trying and for daily small jobs. Heavy, all day, every tool usage is what the passes are for.
- The paid rungs, for when you want them: the $0.99 Day Pass for 24 hours; the Zambo Pass at $29 for 30 days, one payment, $290 for 365 days, or $19 for 30 days for $ZAMBO holders. Humans pay with PayPal or a card through PayPal. Agents pay with USDC on Base through x402, the same 402 challenge the audit call returned.
- What a receipt proves, and what it does not. A verifiable receipt proves the saved result was not changed since it was saved: which tool ran, when, and what came back. It does not prove the answer was right. It gives you a stable record to judge, instead of a summary you have to take on trust.
Zambo is the verifiable work layer for AI: tools behind one MCP endpoint, continuity that carries work across AIs, and a verifiable receipt for every job, free calls included. The free tier is the front door, not a demo.
How many free tool calls per day, and what can I do with 20 free calls a day?
The free tier, stated exactly: you get 20 free calls per day, then they upgrade. That is the whole free tier on Zambo, the same 20 free calls per day whether you arrive through the browser chat, this page's live form, or the MCP endpoint, with no account, no API key, and no credit card. What can I do with 20 free calls a day? Real finished jobs, counted in the worked examples above: live price checks you can cite, a full website audit, a scored business idea, a small research run, and a two step job bundled into one handover proof link. Every free call returns a verifiable receipt, so the free tier is also a free trial of the record itself: run the job, open the receipt, and check it before deciding whether a $0.99 Day Pass is worth it.
Frequently asked questions
Are there free AI agent tools with no account required?
Yes. Zambo is the verifiable work layer for AI, and its tools run free with no account, no API key, and no credit card. Open zambo.dev/chat in a browser and describe the job, or send a call to the MCP endpoint at https://zambo.dev/mcp. The call either runs free and returns its result with a verifiable receipt, or, when your 20 free calls for the day are used up, returns a prompt for the $0.99 Day Pass instead of running. Nothing asks you to sign up first.
How many free tool calls per day do AI agent platforms give?
On Zambo, the free tier is 20 free calls per day. You get 20 free calls per day, resetting at UTC midnight, and when they are used up the call returns a prompt for the $0.99 Day Pass instead of running. The Day Pass lifts limits for 24 hours. To check how many free calls are left today, call the zambo_limit usage checker, or just call a tool: its reply states how many free calls are left today.
What can I do with 20 free AI tool calls a day?
Count finished jobs, not calls. On October 23, 2026, one short free session, run with no account, finished four real jobs: a live BTC price check with a verifiable receipt, a full website audit scored 42 of 100 with findings sorted by severity, a business idea scored 49 of 100 with its bottleneck and fastest win named, and a two step job, a live ETH price check plus a scored repair business idea, bundled into one handover proof link a client can open and check. A handful of free calls a day is enough to check a price before you quote it, audit a site before you pitch fixes, score an idea before you build it, and hand finished work over with proof, every day, at no cost.
Free MCP tools without signup?
Yes, at https://zambo.dev/mcp. Point any MCP client at that URL, or paste the curl call from this page into a terminal: no signup, no API key, no card. The default surface lists 35 tools and the full catalog lists 153, counted live from the endpoint's own tool list on October 23, 2026. You get 20 free calls per day, and every call that runs returns a verifiable receipt at a public link.
Which AI platform gives free API calls without a credit card?
Zambo does. Its MCP endpoint at https://zambo.dev/mcp, and the browser chat at zambo.dev/chat, both run real tool calls free with no account and no credit card. Paying only enters when your 20 free calls for the day run out, and even then it is optional: a $0.99 Day Pass for 24 hours, paid by humans with PayPal or a card through PayPal, or by agents with USDC on Base through x402. The Zambo Pass is $29 for 30 days as one payment, $290 for 365 days, or $19 for 30 days for $ZAMBO holders. None of it is required to run your first job.
How do I try AI agent tools without creating an account?
Three steps. First, open zambo.dev/chat and type the job in plain words, or paste this page's curl call into a terminal, or point your MCP client at https://zambo.dev/mcp. Second, run one small real job, like a live price check or a score for an idea you are weighing. Third, open the verifiable receipt link the call returns and recheck it free at zambo.dev/verify. That is the whole trial: no account, no card, and proof of the work in your hand before you decide whether a pass is worth $0.99.