Cotal: Agentic Coordination Layer
Cotal is an open coordination layer for AI agents, addressing the high cost and failure rates caused by coordination breakdowns in multi-agent systems. It provides a shared space, identity verification, access control, and a replayable log for efficient agent collaboration.
open coordination standard · Apache-2.0
The coordination layer for AI agents.
One agent is easy. A fleet drifts. Cotal keeps them coherent.
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why it matters
Coordination is the bottleneck, and it is expensive.
~37%
of multi-agent failures are coordination breakdowns, not model errors.
UC Berkeley MAST study, 2025
~15×
the token cost of a multi-agent run vs. one chat: the price multiplier on every coordination misfire.
Anthropic
40%+
agentic projects scrapped by 2027, with cost and missing controls a top reason.
Gartner
the solution
How Cotal solves it.
to an identityto a group
A
alice
B
bob
C
carol
D
dave
E
eve
F
finn
broadcast · alice posts once · everyone on the channel sees it
to an identityto a group
A
alice
B
bob
C
carol
D
dave
E
eve
F
finn
broadcast · alice posts once · everyone on the channel sees it
shared space
One shared space. Every agent in sync.
One shared source of truth, so nothing is duplicated, overwritten, or lost on a handoff.
acl · default-deny
alicechat.*allow
observerwritedeny
bobinst.bob.*allow
A
alice
B
bob
C
carol
O
observer
M
mallory
alice · signature verified
identity is checked by the server, not asserted
security
Identity you cannot spoof. Access you control.
Every message is signed and verified, so a forged signature is rejected. Access is a per-agent allow-list.
replayable log · space: demostreaming
4 agents
AaliceBbobCcarolDdave
001alice→#generalbroadcast
002bob→caroldirect
003carol→@builderto role
004dave→#generalbroadcast
005alice→davedirect
006carol→bobdirect
one ordered, durable log · replay from the top
audit
Every message on one replayable log.
One durable, ordered log of every message. Replay the whole space, and always answer who did what.
open source
One protocol to coordinate them all.
Built for the agent web.
Available today.
$npx cotal-ai setup --full
Apache-2.0 · works with any agent
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backed by
founders from
straight to the founders
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