ZV-2026-2004 · 2026-10-09 · mcp.simsima.io
mcp.simsima.io: Field agentSource was removed from create_checkout_link input; consumers still sending it may be rejected or silently ignored.
breaking
What changed
Field agentSource was removed from create_checkout_link input; consumers still sending it may be rejected or silently ignored.
What to do
If your agents call mcp.simsima.io, pin the new snapshot, patch the affected call sites, and let a green contract check confirm the fix. If you don't use the changed tools, nothing is required, but the rest of the ecosystem just learned about it at the same moment you did.
The redline
− agentSource Field agentSource was removed from create_checkout_link input; consumers still sending it may be rejected or silently ignored. − Return a Simsima product URL with agent attribution, for the user to complete checkout. + Return the URL of a plan's page on simsima.io, with the plan preselected, where the user c… create_checkout_link − Get a single plan by its sku. + Get one eSIM plan by its sku, as returned by search_plans or recommend_plan. get_plan − List destinations (countries) Simsima covers, with min price and product URL. + List the destinations Simsima covers (countries, regions and global plans), with the entry… list_destinations − Recommend the best plan(s) for a trip given its length and data usage. + Recommend the best plan(s) for a trip to a destination, given its length in days and expec… recommend_plan − Search plans for a destination (country name or slug), with optional filters. + Search the eSIM plans of a destination (country, region or global), cheapest first, with o… search_plans