kubbi
Claim-check payload handoff for AI agents, queues, webhooks, and MCP tools.
At a glance
Free + paid · Source review 2026-11-04- Price & billing
Free $0 per month verified on the pricing page: up to 20 kubbis per day, 5 active kubbis at a time, 16 KB payload or 1 MB package size, and up to 3 files per kubbi. Pro and Enterprise amounts are described on the pricing page without a named currency in the text read, so no paid-tier charge fact is recorded.
- Free allowance
Free $0 per month verified on the pricing page: up to 20 kubbis per day, 5 active kubbis at a time, 16 KB payload or 1 MB package size, and up to 3 files per kubbi.
- Best suited to
Agent builders whose queues, webhooks, MCP tool results, or A2A messages are awkward for large or sensitive payloads.; Teams that want payloads encrypted, expiring, and burn-after-read without building background plumbing themselves.; Producers and consumers that pass multi-file bundles, such as config, CSV, and report files, through a single claim URL.
Fit is editorial guidance, not a measured result.- Platforms
Access: not separately verified. Operating systems not separately verified.
Published-source facts and editorial guidance. No product test is implied. Confirm current conditions before purchase.
No product screenshot is claimed for this listing. Use the official website ↗ to inspect the current interface.
What to know before choosing
Good fit
Agent builders whose queues, webhooks, MCP tool results, or A2A messages are awkward for large or sensitive payloads.; Teams that want payloads encrypted, expiring, and burn-after-read without building background plumbing themselves.; Producers and consumers that pass multi-file bundles, such as config, CSV, and report files, through a single claim URL.
Limits and trade-offs
Builders who want to pass payloads with no API key or code at all, since Kubbi starts with getting an API key and a client call.; Workloads above the Free plan’s 20 kubbis per day, 5 active kubbis, and 16 KB payload or 1 MB package limits.; Teams looking for a chat or messaging channel itself: Kubbi carries the payload, while the queue, webhook, MCP result, or A2A message carries the URL.
Plans and free allowances
Free $0 per month verified on the pricing page: up to 20 kubbis per day, 5 active kubbis at a time, 16 KB payload or 1 MB package size, and up to 3 files per kubbi. Pro and Enterprise amounts are described on the pricing page without a named currency in the text read, so no paid-tier charge fact is recorded.
Evidence
Official homepage ↗ (reviewed 2026-11-04), Official pricing page ↗ (reviewed 2026-11-04)
Official published documentation reviewed; not a product test
Dates: Last reviewed 2026-11-04. Last reviewed is the latest source or editorial review date; it is not a content-change date.
A closer look at kubbi
Kubbi is a claim-check for agent handoffs: the producer stores a payload once and gets a claim URL, the channel carries only the URL, and the consumer claims the payload when ready. Every payload is encrypted with a time-to-live, and burn-after-read and manifest preview are server-enforced when requested.
Editorial guidance based on published documentation. The workflow below is a suggested starting point, not a measured product result.
When to choose kubbi
- Agent builders whose queues, webhooks, MCP tool results, or A2A messages are awkward for large or sensitive payloads.
- Teams that want payloads encrypted, expiring, and burn-after-read without building background plumbing themselves.
- Producers and consumers that pass multi-file bundles, such as config, CSV, and report files, through a single claim URL.
When to choose something else
- Builders who want to pass payloads with no API key or code at all, since Kubbi starts with getting an API key and a client call.
- Workloads above the Free plan’s 20 kubbis per day, 5 active kubbis, and 16 KB payload or 1 MB package limits.
- Teams looking for a chat or messaging channel itself: Kubbi carries the payload, while the queue, webhook, MCP result, or A2A message carries the URL.
A practical starting workflow
- Get an API key and send files with a time-to-live and a retrieval limit from producer code.
- Pass only the claim URL through the queue, webhook, MCP tool result, or A2A message.
- Let the consumer claim the payload when ready, with expiry and burn-after-read enforced on the server.
Check before committing
- Free-tier limits are daily and per-kubbi limits as stated; no monthly free allowance total is asserted.
- The pricing page states every account starts with generous free limits and Pro is for higher quotas; no Pro amount is asserted as a fact here.
Common questions
Is the free tier really free?
Yes in the pricing FAQ sense: sign up and start creating kubbis immediately with generous default quotas, with no card mentioned for the Free plan.
What happens when I hit a free-tier limit?
Upgrade to Pro for higher limits, or wait for the rolling 24-hour window to clear.
What does Kubbi solve?
Channels are good for control flow but awkward for payloads: size limits, sensitive data sitting in logs, and multi-file bundles that do not fit inline, so Kubbi takes the payload off the channel.
How does burn-after-read work?
Every kubbi has a retrieval limit; hitting it makes the payload gone, enforced on the server rather than as a flag the caller must remember.
Compare approaches for this task
- AgentHub — A platform to build and host AI automations with pre-built workflows.
- AIOProductOS — Product teams that want to build what pays, since the platform ties each customer record to feedback, revenue, work and code.; Companies that need enterprise controls, since the pricing page highlights EU and US data residency, BYOK encryption, SAML/SSO on Pro and 150+ compliance controls.
Sources and checks
Last source review is not a date of product testing. No rating or test result is implied by inclusion. Check the current plan and terms before buying.