SpaceNexus space data
by spacenexus.us · remote · no sign-in to list tools · v1.1.0 · published by us.spacenexus
Read-only space industry data: launches, slips, funding, companies, space weather, Moon race, jobs.
14 tools: 10 change things and 4 only read.
Scanned Oct 21, 2026
- Deletes or cancels0Claude Code: deny
- Can't be undone0Claude Code: ask
- Changes things10Claude Code: ask: see these tools
- Only reads4Claude Code: allow: see these tools
1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.
claude mcp add --transport http spacenexus https://spacenexus.us/api/mcpFindings
Matches of fixed checks, with the text they matched.
- Warndataset_links
The server marks "dataset_links" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "dataset_links" says "link": a word for a change.
Tools
Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.
14 tools
Changes things 10Claude Code: ask
dataset_linksNeeds a SpaceNexus API key (a free key is enough).1 finding
Why it is in this group
- The name "dataset_links" says "link": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
The server marks "dataset_links" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "dataset_links" says "link": a word for a change.
Description, as the server wrote it Needs a SpaceNexus API key (a free key is enough). The bulk SpaceNexus datasets: for each one its CSV and JSON download links, what it holds, its columns, its licence statement, its DOI when minted and the page that shows it, plus the Promise Ledger CSV. The downloads themselves need no key.
Annotations the server declares
- title: SpaceNexus dataset links
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
funding_round_historyNeeds a SpaceNexus API key on the Professional or Research plan.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Needs a SpaceNexus API key on the Professional or Research plan. The full published history of private funding rounds into space companies, not only the last 90 days: date, amount (null when undisclosed or stated only approximately, never estimated), series and round type, pre- and post-money valuation where the source names the basis, lead investor and every listed investor, how the round is evidenced and its source link. Filter by company, investor, stage, dates and amount; page with offset.
Annotations the server declares
- title: Funding round history
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
launch_ledger_recordNeeds a SpaceNexus API key (a free key is enough).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Needs a SpaceNexus API key (a free key is enough). The full Launch Ledger record: every launch date change our ledger holds since recording began, one row per launch per UTC observation day, with the observation fields (live or catch-up, the catch-up reason, Launch Library 2's last-updated time), both dates at their precision and its basis, the size and kind of the move, and whether it counts as a slip. Filter by launch, provider, rocket, observation, kind and day; page with offset. The same rows as the free launch-slips dataset.
Annotations the server declares
- title: Launch Ledger full record
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
launch_on_time_recordHow often launches fly on time: the share of flown launches that lifted off within 1 day and within 7 days of the first firm date on record, with mean and median delay, grouped by …No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it How often launches fly on time: the share of flown launches that lifted off within 1 day and within 7 days of the first firm date on record, with mean and median delay, grouped by provider, vehicle or launch site.
Annotations the server declares
- title: Launch on-time record
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
launch_slipsRecent launch date changes as the SpaceNexus slip ledger recorded them (old date, new date, size of the move, kind of move), with totals since recording began and the provider scor…No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Recent launch date changes as the SpaceNexus slip ledger recorded them (old date, new date, size of the move, kind of move), with totals since recording began and the provider scorecard once the ledger is large enough. Each change carries observation: live (our sync saw it when it happened) or catch-up (our sync only caught up late, so observedAt is when we saw it, not when it changed). Caught-up changes are returned apart in caughtUpChanges and never counted in the summary figures.
Annotations the server declares
- title: Launch slip ledger
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
next_launchesUpcoming orbital launches from the SpaceNexus manifest (the next 50 scheduled), filterable by provider, rocket, launch site and country.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Upcoming orbital launches from the SpaceNexus manifest (the next 50 scheduled), filterable by provider, rocket, launch site and country. Each launch has its NET date and precision, status, the date changes our ledger recorded, and its page URL. realSlips and otherDateMoves count only changes our sync saw when they happened; caughtUpDateMoves counts changes it only caught up with late (made earlier, on a day we do not know), which are never counted as slips.
Annotations the server declares
- title: Next launches
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
promise_ledger_entriesNeeds a SpaceNexus API key (a free key is enough).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Needs a SpaceNexus API key (a free key is enough). Entries from the SpaceNexus Promise Ledger: dated public commitments about spaceflight by agencies, companies and executives, each with the verbatim quote, who said it and when, the deadline as stated and normalised, the status shown today, the outcome and its source, and every later revision. Filter by party, status, claim type or words; page with offset.
Annotations the server declares
- title: Promise Ledger entries
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
recent_funding_roundsClosed private funding rounds into space companies in the last 90 days, newest first, with amount (null when undisclosed, never estimated), stage, investors, how the round is evide…No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Closed private funding rounds into space companies in the last 90 days, newest first, with amount (null when undisclosed, never estimated), stage, investors, how the round is evidenced and its source link.
Annotations the server declares
- title: Recent funding rounds
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
space_score_historyNeeds a SpaceNexus API key whose owner has SpaceNexus Research (the Space Score history is a Research product).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Needs a SpaceNexus API key whose owner has SpaceNexus Research (the Space Score history is a Research product). One company's daily Space Score readings for up to 365 days: score, rank, the change from the previous reading, large moves flagged, and why a reading moved where the stored inputs can say. The current score stays free in company_lookup.
Annotations the server declares
- title: Space Score history
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
space_weather_nowCurrent geomagnetic Kp and NOAA G-scale, solar wind speed, density and Bz, the NOAA 3-day flare outlook and flares in the last 14 days, with a plain-language read for satellite ope…No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Current geomagnetic Kp and NOAA G-scale, solar wind speed, density and Bz, the NOAA 3-day flare outlook and flares in the last 14 days, with a plain-language read for satellite operators. NOAA SWPC and NASA DONKI data.
Annotations the server declares
- title: Space weather now
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
Only reads 4Claude Code: allow
company_lookupPublic profile facts for a space company: what it does, sector, country, headquarters, founding year, public or private, ticker, funding and last round as shown on its profile (for…No findings
Why it is in this group
- The name "company_lookup" says "lookup": a word for reading.
Description, as the server wrote it Public profile facts for a space company: what it does, sector, country, headquarters, founding year, public or private, ticker, funding and last round as shown on its profile (for a listed company the funding figure is the private rounds it raised before listing, and fundingBasis says which rule applies), and its Space Score when it is ranked.
Annotations the server declares
- title: Company lookup
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
moon_race_statusThe US vs China Moon race tracker: milestones demonstrated on both 8-rung ladders (crewed landing and sustained presence), who leads each, the projection call with its date bands, …No findings
Why it is in this group
- The name "moon_race_status" says "status": a word for reading.
Description, as the server wrote it The US vs China Moon race tracker: milestones demonstrated on both 8-rung ladders (crewed landing and sustained presence), who leads each, the projection call with its date bands, official targets and the next uncrewed landing attempt.
Annotations the server declares
- title: Race to the Moon status
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
search_siteSearch spacenexus.us: companies, rockets, launches, launch sites, guides, charts, Moon missions, funding rounds and analysis.No findings
Why it is in this group
- The name "search_site" says "search": a word for reading.
Description, as the server wrote it Search spacenexus.us: companies, rockets, launches, launch sites, guides, charts, Moon missions, funding rounds and analysis. Returns titles, one-line descriptions and the canonical URL of each page.
Annotations the server declares
- title: Search SpaceNexus
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
space_jobs_countHow many open roles the SpaceNexus jobs board lists right now (mirrored daily from employers' careers pages), how many employers are hiring, how many roles are new this week or rem…No findings
Why it is in this group
- The name "space_jobs_count" says "count": a word for reading.
Description, as the server wrote it How many open roles the SpaceNexus jobs board lists right now (mirrored daily from employers' careers pages), how many employers are hiring, how many roles are new this week or remote, and optionally one employer's open roles.
Annotations the server declares
- title: Space jobs count
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Install
Pinned to version 1.1.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http spacenexus https://spacenexus.us/api/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__spacenexus__company_lookup",
"mcp__spacenexus__moon_race_status",
"mcp__spacenexus__space_jobs_count",
"mcp__spacenexus__search_site"
],
"ask": [
"mcp__spacenexus__next_launches",
"mcp__spacenexus__launch_slips",
"mcp__spacenexus__launch_on_time_record",
"mcp__spacenexus__recent_funding_rounds",
"mcp__spacenexus__space_weather_now",
"mcp__spacenexus__launch_ledger_record",
"mcp__spacenexus__promise_ledger_entries",
"mcp__spacenexus__dataset_links",
"mcp__spacenexus__funding_round_history",
"mcp__spacenexus__space_score_history"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as spacenexus. Review it before you use it.