Chromaweb

Chromaweb offers two Betfair API (Application Programming Interface) Products:

MTPro, which is Transactional, i.e. you can place bets directly to Betfair using MTPro.

MTPro also has all of the Data and Graphing functionality of our data-only product, ChromawebMT.
ChromawebMT, which is non-Transactional - cannot place bets, but displays live Betfair market data and graphs.

You can try out either or both of our products for 14 days absolutely free:

We strongly recommend that you take advantage of the 14 Day free trials of our products to ensure they meet your requirements before committing to a purchase or subscription

Transactional: One-Click bet placement / cancellation on all Betfair markets (except Asian Handicaps)
Ladder and Traditional betting interfaces
Tracks all Betfair Markets
Fill or Kill functionality.
Live Graphs and Data refreshing at up to 4 times per second
Track several Betfair markets concurrently
Track single runners
One Click Greening / Hedging
Bet on and track on your selection of runners in any event on a single graph
Matched Bets Alarm
Betfair BSP and 'Keep' Bets funtionality.

Subscription:

3 Months ... £35
6 Months ... £60
12 Month ... £100