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Market around once-gate

An MCP proxy and Python library that prevents AI agent side effects from running more than once. It gates tool calls, supports exact human approval, stores results, and refuses to automatically retry unfinished actions.

Visit github.com ↗Pricing page ↗

Explore the market

Prices and medians update for the tier you select. Caution: thin market — treat statistics as indicative.

Compare at
once-gate · Pro
No Pro plan
—
Pro-MCP server median
—
insufficient comparable pricing
vs Pro MCP servers
No comparison
once-gate doesn't sell Pro
ⓘ Comparisons are same provider type (MCP server) and same buyer tier (Pro). Never across tiers.
Market density
64th pctile
307 competing vendors
Comparable listings · 30d
—

No providers in this market have a Pro-tier plan — try another tier.

Products in this market

Ranked by how closely each one matches once-gate's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.

MMCP servers21Ranked by similarity
once-gatethis listing
● MCP
no public price
AW-1 Breaker
● MCP81% similar
no public price
Vouchwell
● MCP81% similar
no public price
mcpcut
● MCP81% similar
no public price
Planlock
● MCP80% similar
no public price
Vaara
● MCP80% similar
no public price
Agent Firewall
● MCP80% similar
no public price
Agent Chaperone
● MCP79% similar
no public price
MCP Intercepter
● MCP78% similar
no public price
CloakPipe
● MCP77% similar
no public price
Two-Key
● MCP77% similar
no public price
MetaMynd MCP Gateway
● MCP77% similar
no public price
Abhed MCP
● MCP76% similar
no public price
oathline-guard
● MCP75% similar
no public price
FU
fusional
● MCP75% similar
$1,500 one-time Pro
not monthly-comparable
Delta Compressor
● MCP75% similar
no public price
gateplex
● MCP75% similar
no public price
ContextGate
● MCP74% similar
no public price
Withhuman
● MCP74% similar
no Pro plan
entry $20/mo
Blackout
● MCP74% similar
no public price
Mcp Idempotent
● MCP74% similar
no public price
OOther14Ranked by similarity
Countersign
● OTHER78% similar
no public price
AegisCore
● OTHER77% similar
no public price
Squidbrake
● OTHER76% similar
no public price
VEOR
● OTHER76% similar
no public price
Agent Effect Gate
● OTHER76% similar
no public price
Invock
● OTHER75% similar
no public price
CA
CallWitness
● OTHER75% similar
no public price
Agent Trust Plane
● OTHER75% similar
no public price
Aileron
● OTHER75% similar
no public price
Stroq
● OTHER75% similar
no public price
TrifectaGuard
● OTHER74% similar
no public price
Agentguard
● OTHER74% similar
no public price
TLS-for-Nimoguard
● OTHER74% similar
no public price
HOL Guard Plugin
● OTHER74% similar
no public price
FFrameworks11Ranked by similarity
Agenttrustops
● FRAMEWORK77% similar
no public price
ctrlrun
● FRAMEWORK76% similar
no public price
RooAGI Agent Supervisor
● FRAMEWORK76% similar
no public price
Aegis
● FRAMEWORK75% similar
no public price
HUMMBL
● FRAMEWORK75% similar
no public price
SAVI Loop Guard
● FRAMEWORK75% similar
no public price
Midge Security
● FRAMEWORK75% similar
no public price
Thumbgate
● FRAMEWORK75% similar
no public price
Call4Agents
● FRAMEWORK74% similar
no public price
Allem
● FRAMEWORK74% similar
no public price
Attenu
● FRAMEWORK74% similar
no public price
PPlatforms2Ranked by similarity
Tarfio
● PLATFORM76% similar
no public price
AgentRaaS
● PLATFORM74% similar
no public price
AAgents1Ranked by similarity
shield
● AGENT75% similar
no public price
AAPIs1Ranked by similarity
Agent Middleware
● API75% similar
no public price

Thin market — few comparable priced products; treat statistics as indicative.