The document discusses the growth and state of open APIs as of May 2010, highlighting a rapid increase in the number of APIs and significant market trends. Notably, it reveals a shift towards RESTful APIs and an increase in JSON support, alongside emerging practices like OAuth and versioning. The document emphasizes the growing importance of APIs as standalone products and the evolving landscape of web development.

1. Open APIs: State of the Market John Musser, ProgrammableWeb @johnmusser Glue Conference, May 2010

2. Introduction ProgrammableWeb.com Launched summer 2005 API & mashup directory News, community, reference 2,000 Web APIs 4,800 mashups

3. Open API timeline 2000 2002 2005 2006 2007 105 APIs 352 APIs 2003 2008 1,116 APIs 601 APIs It took 8 years to get to 1,000 APIs, but 18 months to get to 2,000 APIs 2010 has a 2x increase in new APIs per month over last year 2009 1,628 APIs 2010 ? APIs

4. APIs: Some very competitive markets Number of API providers in each of the top 15 categories Based on directory of 2,000 web APIs listed at ProgrammableWeb, May 2010

5. Open APIs: Sampling growth by sector

6. Open APIs: Sampling growth by sector YouTube sells for $1.7B YouTube sells for $1.7B

7. Open APIs: Sampling growth by sector Facebook opens platform

8. API Billionaires Club 5 billion API calls / day (April 2010) 1.1 billion API-delivered stories / month (March 2010) 5 billion API calls / day (October 2009) 8 billion API calls / month (Q3 2009) 3 billion API calls / month (March 2009) 3 billion API calls / day, 75% of all traffic (April 2010) Over 50% of all traffic via API (March 2008) Over 100 billion objects stored in S3 (March 2010)

9. REST vs. SOAP: Simplicity wins again Distribution of API protocols and styles Based on directory of 2,000 web APIs listed at ProgrammableWeb, May 2010

10. REST vs. SOAP, more of both, but a lot more REST Total number of APIs based on protocol and style Based on directory of 2,000 web APIs listed at ProgrammableWeb, May 2010

11. JSON Rising: 45% of all new APIs support JSON Percentage of new APIs with JSON support 132 APIs are now JSON-only, including Facebook Graph, Etsy, Hunch Based on directory of 2,000 web APIs listed at ProgrammableWeb, May 2010

12. OAuth picking up steam 20% of 133 “Social” APIs now with OAuth support 80+ APIs with OAuth support

13. APIs growing up: versioning & other best practices Old Twitter http://twitter.com/users/show/noradio.xml New Twitter http://api.twitter.com/1/users/show/noradio.xml

14. APIs growing up: keeping developers informed

15. APIs growing up: keeping developers informed http://www.programmableweb.com/api/ebay/status

16. API as Product When an API is not an extension of your product, but it is your product

17. Invisible Mashups, part 1 Classic mashup HousingMaps.com Invisible mashup Ooyala.com EC2 + S3 + SQS +

18. Invisible Mashups, part 2 + APIs are hiding in plain sight, if you know where to look

19. Have we seen this before? 1995 Why do we need a Web site? 2000 2005 2010 Of course we have a Web site Of course we have an API Why do we need an API?

20. thank you Questions, ideas, comments? Email me: john@programmableweb.com Twitter: @programmableweb @johnmusser