Reactor

The connectivity layer between Web2 and Web3.

[Reactor @Reactorize]

We’re looking to talk with teams that have one painful Web2↔Web3 workflow.

Examples:

- A backend needs to trigger an onchain action.

- A smart contract needs to notify a Web2 system.

- A team wants cross-chain execution without running custom relayers.

- An app needs policy checks before execution.

Reactor is built for one workflow at a time.

If this sounds familiar, we’d like to hear from you.

[Reactor @Reactorize]

Infrastructure is easier to adopt when teams can predict how it behaves and what it costs.

For Web2↔Web3 workflows, teams need clarity around:

• message pricing
• destination execution
• retry behavior
• failure states
• supported chains
• policy controls
• operational visibility

Reactor is designed to make connected workflows more predictable from the start.

[Reactor @Reactorize]

Web2↔Web3 is not one use case.

It is a pattern across many workflows:

• commerce event → onchain reward
• contract event → backend update
• payment event → settlement workflow
• risk check → execution approval
• chain event → user notification
• app backend → smart contract action

Reactor is built to connect these systems without every team building custom infrastructure from scratch.

[Reactor @Reactorize]

Fully onchain coordination means more of the workflow happens in a place that can be verified, minimizing trust assumptions.

For Reactor, that includes:

• message intake
• payload verification
• routing logic
• policy checks
• execution coordination
• status tracking

The goal is simple:

Make Web2↔Web3 and cross-chain workflows easier to trust and operate.

[Reactor @Reactorize]

Most Web2↔Web3 integrations become harder than they should.

Not because the use case is unclear.

Because every connection adds more surface area:

• custom relayers
• chain-specific logic
• backend scripts
• retry handling
• monitoring gaps
• security review

Reactor is designed around a smaller integration surface.

One API for Web2 systems.
One contract call for blockchains.
One coordination layer between them.

[Reactor @Reactorize]

Connecting existing systems to blockchains should not require every team to build custom relayers, monitors, retry logic, and chain-specific glue.

Reactor is built to simplify that path:

Web2 API → onchain action
contract event → Web2 endpoint
chain event → destination execution
policy check → safer workflow

One execution layer for connected Web2↔Web3 workflows.

[Reactor @Reactorize]

Before adopting Web2↔Web3 infrastructure, teams should ask:

Can we start with one workflow?
Can we observe the full lifecycle?
Are retries safe?
Are message IDs deterministic?
Can policy checks run before execution?
Do we understand the trust model?
Can costs be predicted?

These should be table stakes.

[Reactor @Reactorize]

Some workflows should not execute just because a message arrived.

They may need policy checks first:

Is the destination allowed?
Is the amount within limits?
Is the contract approved?
Is the workflow paused?
Does the action match business rules?

That is the role Sentinel is being built to fill inside Reactor.

[Reactor @Reactorize]

Every Web2↔Web3 integration has a trust model.

The important question is whether teams can understand it.

Who detects the event?
Who routes the message?
Who decides execution?
Who can retry?
Who can pause?
What can be audited afterward?

Reactor is built around clearer, onchain execution paths.

[Reactor @Reactorize]

Web2↔Web3 integrations often start small.

Then they become infrastructure debt:

•custom scripts
•manual retries
•chain-specific logic
•relayer operations
•monitoring gaps
•unclear failure states
•security exceptions

Reactor is built to turn that glue code into a repeatable execution layer.

[Reactor @Reactorize]

Stablecoin payments are only one step in a larger workflow.

The harder part is coordinating everything around the payment:

• account updates
• risk checks
• settlement logic
• notifications
• smart contract execution
• offchain records
• automation

The next layer is not just payment rails.

It is the programmable workflow infrastructure between Web2 and Web3.

[Reactor @Reactorize]

Smart contracts should be able to notify real systems without every team building custom monitors, scripts, and relayers.

A smart contract should be able to trigger:

- a backend update
- a webhook
- a compliance check
- a user notification
- a workflow in an existing system

Reactor is built to make Web3→Web2 coordination a first-class workflow.

[Reactor @Reactorize]

A Reactor message follows a simple path:

1) Detect a source event
2) Verify the payload hash
3) Run policy/risk checks before execution
4) Process the requested action
5) Deliver the result to a chain or Web2 endpoint

Messaging is only the start.

The goal is safer cross-system execution.

[Reactor @Reactorize]

Cross-chain and Web2↔Web3 workflows need more than message delivery.

Teams need to know:

- Did the source event happen?
- Was the payload verified?
- Did policy checks pass?
- Was execution attempted?
- Did the result reach the destination?

That is why ReactorScan matters.

Visibility turns messaging into operable infrastructure.

[Reactor @Reactorize]

Stablecoins reduce settlement friction, but they do not remove workflow friction.

Banks, brokerages, fintech apps, and onchain protocols still need to coordinate actions across APIs, chains, accounts, policies, and execution environments.

That is the missing layer.

Reactor is building fully onchain connectivity for Web2↔Web3 workflows, one workflow at a time.

[Reactor @Reactorize]

Reach out here:
https://t.co/Fgu5QrwMk6

[Reactor @Reactorize]

We’re looking to talk with teams that have one painful Web2↔Web3 workflow.

Examples:

- A backend needs to trigger an onchain action.

- A smart contract needs to notify a Web2 system.

- A team wants cross-chain execution without running custom relayers.

- An app needs policy checks before execution.

Reactor is built for one workflow at a time.

If this sounds familiar, we’d like to hear from you.

[Reactor @Reactorize]

Web-to-chain should not require a platform rewrite.

Start with one workflow:

A backend triggers an onchain action.

- No gas juggling across chains.
- No custom relayer infrastructure.
- No extra validator network.

Reactor Core supports Web-originated messages today.

Next: public API, SDKs, and ReactorScan.

[Reactor @Reactorize]

Interoperability should not stop at moving messages between chains.

The next step is Web2 systems, smart contracts, automation, and policy checks coordinating safely across one execution layer.

That is what Reactor is building: fully onchain connectivity for Web2↔Web3 and cross-chain workflows.

Core deployed. Gateways on 24 chains.

Next: SDKs, Sentinel, and ReactorScan.

[Reactor @Reactorize]

Reactor is built around a simple idea:

Web2 systems and blockchains should be able to exchange data and trigger actions as easily as calling an API.

No offchain relayers.
No separate validator network.
One onchain execution layer on the Internet Computer by @dfinity.

Core is deployed. Gateways are on 24 chains. Next: SDKs, Sentinel, ReactorScan, and production activation.

[Reactor @Reactorize]

Happy New Year to everyone!

Let's make 2026 the year we connect Web2 and Web3! 🦾

#HappyNewYear2026 #Blockchain #Interoperability