Short-Term Scientific Missions (STSM) consist in exchange visits between researchers participating in a COST Action. This kind of activity is allowing scientists to visit an institution or laboratory in another COST Member, Cooperating Member or Near-Neighbour Country joining the Action. The duration of such  missions may last up to six months. The aim of a STSM is to foster collaboration in relevant  research infrastructures and to share new techniques that may not be available in a participant’s home institution or laboratory.

Take a look to our last STSMs

How to apply?

For any information about the submission procedure for applicants or hosts, please contact our STSM coordinator Penny LABROPOULOU.

Open Calls

4th Call for Short-Term Scientific Missions (STSM) proposals


If you want to apply for an STSM, please follow the steps below:

  1. Read carefully section 8 of the COST Vademecum.
  2. Obtain a letter of invitation from the Host Institution confirming that they can undertake the STSM on the given dates should your application be approved.
  3. If you do not already have an e-COST account, create one at
  4. Submit an application online at:

Detailed information on the submission process, requirements and conditions, along with the evaluation criteria and the duration of STSMs, is available at this document.

When to apply

You can apply for an STSM at any time during the project but all STSM applications are collected and evaluated in batches, with closing dates set at the end of February, April, June, August, October, December. Collected applications are approved/rejected in batches by the STSM panel until the 15th of the following month. An STSM call is issued one month prior to each collection date to invite and encourage STSM applications. 

Topics and hosts

For each call, there may be a list of suggested topics by WG (co-)leaders or interested Host institutions – although applicants can also apply for STSMs with other topics relevant to the COST Action. You can apply at any time throughout the project; if positively evaluated, your proposal will be included in the following Call. You can find more information on how to apply and the evaluation criteria for proposals in the following document.