Flux Cloud
https://mcp.runonflux.com/mcp ↗
Description
Deploy, pay for and manage apps on Flux Cloud, the decentralized cloud. Prices in USD.
What our measurements say
Flux Cloud is a remote MCP server published at mcp.runonflux.com. It has been probed 8 times since 9/12/2026. It answered in 8 of them (100.0%), a near-uninterrupted record. Median response time is 526 ms, a delay an agent will notice. It exposes a broad tool surface of 15 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool names are generally descriptive of their purpose
- Required parameters are clearly marked in input schemas
- Descriptions explain both functionality and use cases
Weaknesses
- Some parameter value ranges/validations are unspecified
- Error handling details are sparse in most tool descriptions
- Tool names like 'flux_build_spec' could be more specific about their output format
- Missing explicit documentation of possible action values in control tools
flux_control_app— Action parameter lacks explicit value examples (restart/redeploy/remove)flux_build_spec— 'v8 specification' reference without format definitionflux_get_app_logs— 'N log lines' parameter lacks minimum/maximum value guidanceflux_deploy_app— 'enterprise' parameter object lacks field definitions
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test passed · last run:
- Cold-start: cold 147ms → warm 90ms (penalty 57ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
flux_get_identityReturns the Flux ID (app owner address), the payment address and its spendable FLUX balance with its USD value. Explains what to configure if keys are missing. Never returns private keys.
fluxIdPrivateKeystringpaymentPrivateKeystring
flux_generate_keysCreates two fresh private keys (WIF): one for the Flux ID that will own apps, one for the address that pays. The response contains the secrets; store them in the MCP server environment as FLUX_ID_PRIVATE_KEY and FLUX_PAYMENT_PRIVATE_KEY, then restart the server. Nothing is stored or sent anywhere by this tool.
fluxIdPrivateKeystringpaymentPrivateKeystring
flux_get_pricingReturns the current USD rate card, the live FLUX/USD rate, the pay-in-FLUX discount and instant USD estimates for a few reference sizes. Use flux_quote_app for the exact price of a specific app.
fluxIdPrivateKeystringpaymentPrivateKeystring
flux_build_specTurns images, ports, resources and a term into a complete, correctly formatted v8 specification, with public ports auto-picked and data replication enabled. Returns the spec plus local validation errors and warnings.
namestringrequireddescriptionstringcomponentsarrayrequiredinstancesintegermonthsnumberexpireBlocksintegercontactsarraygeolocationarraynodesarraystaticipbooleanownerstringfluxIdPrivateKeystringpaymentPrivateKeystring
flux_validate_specRuns the local rule checks, then asks a FluxOS node to verify the specification exactly as it would at registration (image reachable, architecture, ports, name availability). Returns the node-formatted spec on success.
specobjectrequirednetworkbooleanfluxIdPrivateKeystringpaymentPrivateKeystring
flux_quote_appReturns the Flux Cloud price for registering the given specification, or for updating it if an app of that name already exists (the unused part of the current term is credited). Price is in USD with the FLUX amount at market rate.
specobjectrequiredfluxIdPrivateKeystringpaymentPrivateKeystring
flux_deploy_appValidates the specification on a node, quotes it, and with confirm=true signs it with the Flux ID, broadcasts it and pays the quoted FLUX from the payment address. Without confirm it only returns the plan (price, balance, warnings) and spends nothing. Registers a new name or updates an existing app of the same owner. Then call flux_wait_for_app with the returned txid.
specobjectrequiredenterpriseobjectconfirmbooleanfluxIdPrivateKeystringpaymentPrivateKeystring
flux_wait_for_appPolls the network for up to timeoutSeconds (default 45 to fit hosts with a 60 s tool timeout, max 600). Returns payment confirmations, whether the spec was accepted, and the running instances with URLs. Safe to call repeatedly until done=true.
namestringrequiredtxidstringpreviousHashstringtimeoutSecondsintegerfluxIdPrivateKeystringpaymentPrivateKeystring
flux_get_appLooks up any app on the network by name and returns its published specification, expiry, running instances and URLs.
namestringrequiredfluxIdPrivateKeystringpaymentPrivateKeystring
flux_list_my_appsLists every app registered by the owner (or a given Flux ID) with expiry and instance counts.
ownerstringnameContainsstringfluxIdPrivateKeystringpaymentPrivateKeystring
flux_get_app_logsFetches the last N log lines of an app (or one component of it) from one of the nodes running it. Requires the owner key.
namestringrequiredcomponentstringlinesintegernodeIpstringfluxIdPrivateKeystringpaymentPrivateKeystring
flux_get_app_statsCPU, memory and network stats of the containers of an app on one node. Requires the owner key.
namestringrequiredcomponentstringnodeIpstringfluxIdPrivateKeystringpaymentPrivateKeystring
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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