Week in Space Data, every Friday.
Space industry data through a simple REST API: launches, companies, funding rounds, satellites, regulatory intelligence and more. Free keys for any account; every dataset also downloads without one.
Sign up for a free SpaceNexus account. Free keys cover the core tables; Professional adds every endpoint.
Go to the API Keys tab and create a new key. Save it securely -- it is shown only once.
Send your key in the Authorization header. Limits, licence and terms are on the free API page.
Free JSON feeds for anyone: no key, no account, CORS open (Access-Control-Allow-Origin: *), cached, and limited to 60 requests a minute per IP (a 429 with Retry-After beyond that). Please cache on your side. The index is /api/open. Using Claude, ChatGPT or another AI assistant? The same data is available as an MCP server: SpaceNexus in AI assistants.
| Feed | What is in it | Cached |
|---|---|---|
| /api/open/launches | The next 50 orbital launches on the manifest, plus launches flown in the last 30 days with their outcome (success, partial failure, failure), each with our recorded date changes and a link to its page. Launch facts: Launch Library 2 by The Space Devs. Outcome wording, slip counts and links: SpaceNexus. | 5 min |
| /api/open/launch-slips | Recent launch date changes as our ledger recorded them (moves of one launch on one UTC day netted into one row), with totals since recording began. The ledger is SpaceNexus data; mission names and the dates themselves come from Launch Library 2. | 10 min |
| /api/open/space-score | The 25 highest-ranked companies on the current Space Score board, with tier, confidence, data coverage and pillar scores, and a link to the method. SpaceNexus data, computed by the published method from public inputs. | 60 min |
| /api/open/moon-race | US vs China: milestones demonstrated on both 8-rung ladders, the projection call with its headline-scenario date bands, official targets and the next uncrewed landing attempt. SpaceNexus data; every rung cites its sources on /moon. | 60 min |
| /api/open/funding-rounds | Closed private funding rounds into space companies in the last 90 days (up to 50, newest first) with the headline summary. IPOs, offerings, debt, grants, acquisitions and "Raising now" intentions are not included. Round facts as reported by each row’s cited source (SEC filings, company releases, publishers). Classification and summary: SpaceNexus. | 15 min |
Licence and credit. Our own data is CC BY 4.0: reuse it, commercially or not, with the line “Data: SpaceNexus (spacenexus.us)” and a link. Every response says which fields are ours (attribution.ours) and which come from a third party (attribution.thirdParty, for example launch facts from Launch Library 2 by The Space Devs); we do not relicense third-party data, so credit them too.
Whole tables, no account: every dataset (companies, funding rounds, the launch log, the slip ledger, hiring counts and executive moves) downloads as CSV or JSON, with its version, licence, citation and checksum inside. Frozen editions (quarterly funding, Slip Index, Slip Watch, On-Time report) appear there once each has been frozen; the catalogue is /api/datasets.
Static CSVs, also CC BY 4.0: the Race to the Moon datasets /moon/missions.csv, /moon/landings.csv and /moon/promise-ledger.csv (column notes and citations on datasets). Also free: the jobs feed /api/feed/jobs, and live embeddable cards for the same data on widgets.
| Open feeds | Free key | Professional key | |
|---|---|---|---|
| Access | No key, no account | Free account, key in the Authorization header | Professional or Research, key in the Authorization header |
| Data | Current snapshots: next 50 launches, recent slips, Space Score top 25, Moon race, last 90 days of rounds | Launches, launch vehicles, companies, executive moves and space weather, with filters and paging | Every v1 endpoint, with filters, paging and history |
| Limits | 60 requests a minute per IP | 100 requests a day and 20 requests a minute per key | 5,000 requests a month and 60 requests a minute per key; the per-minute limit is in the X-RateLimit-Limit header |
| Browser use | Yes (CORS open) | Server-side (keep your key secret) | Server-side (keep your key secret) |
Companies, News, Launches, Market, Satellites, Compliance, Procurement, Launch Vehicles, Weather, Opportunities, Funding Rounds, Executive Moves, Company Scores, Supply Chain, Market Sizing
Standard REST conventions with consistent JSON response format
Full OpenAPI specification for code generation and documentation
Transparent rate limits with X-RateLimit headers on every response
Track your API usage by endpoint, status code, and time period
Seamlessly rotate API keys without downtime
Free keys for any account; Professional and Research add every endpoint and higher limits. Which plan a key runs on follows its owner's subscription at the time of the call.
| Free key | Professional key | |
|---|---|---|
| Who | Any SpaceNexus account with a verified email | Paid Professional and Research subscribers (a free trial runs on the free plan) |
| Volume | 100 requests a day per key | 5,000 requests a month per key |
| Rate limit | 20 requests a minute per key | 60 requests a minute per key |
| API keys | Up to 2 keys per account | Up to 3 keys per account |
| Endpoints | Launches, launch vehicles, companies, executive moves and space weather | All v1 endpoints, including funding rounds, market, news, contracts, regulatory, satellites and opportunities |
| Key management | Create, rotate, and revoke keys | Create, rotate, and revoke keys |
| Usage analytics | Per-endpoint and daily call breakdowns | Per-endpoint and daily call breakdowns |