Get a prenup with First: ask prenup questions, set up your account, and add assets.
Connect Remote server
claude mcp add --transport http first https://mcp.thisfirst.com/mcp{
"mcpServers": {
"first": {
"url": "https://mcp.thisfirst.com/mcp"
}
}
}{
"servers": {
"first": {
"type": "http",
"url": "https://mcp.thisfirst.com/mcp"
}
}
}Settings > Connectors > Add custom connector
URL: https://mcp.thisfirst.com/mcpTools 35 found in our last check
get_startedReturns the customer's first name, the setup stage of their First account, and the one next step. It also says what the assistant can do now. After the setup, it gives the status of the agreement. At the onboarding stage, it gives the welcome steps to do in the chat. Call it at…
get_my_detailsReturns the customer's First account details: the legal name, the email, the phone, the partner or the partner invite, and the purchases. Use it when the customer asks about these details. Do not use the email of the AI app account. To change the name, call update_profile. To ch…
update_profileSaves the customer's full legal name, as on their birth certificate, driver's license, or passport. The name goes into the agreement. Confirm the exact spelling with the customer before you call this tool. Returns the next setup step, as get_started does.
update_phoneSaves the customer's US phone number, which First uses for texts about the service. An empty phone removes it. Confirm the number with the customer before you call this tool, and tell the customer: "By providing your phone number you consent to receiving transactional texts." At…
request_email_changeAsks to change the email that the customer uses to sign in to First. Confirm the new email with the customer before you call this tool. The tool does not change the email: the customer approves the change from the current email, and then confirms the new email from a sign-in lin…
finish_welcome_stepsFinishes the welcome steps of a paid product, as the dashboard of the First app does. It saves the acceptance of the statements of welcome.confirm from get_started, and the optional phone. Call it only at the onboarding stage. First show each statement, and get an explicit yes t…
get_agreement_statusReturns where the customer is in their First agreement: the status, the waiting period when there is one, the current step in the app, and a link to the app. Before the account setup is done, it returns the setup stage and the next step, as get_started does. Do not use it for qu…
get_quiz_questionReturns the current question of a quiz module of the customer: the text, the options with their ids, the format of the answer, the saved answer, and the progress. Ask the customer the question, then call answer_quiz_question. The result can include notes: the text of the informa…
answer_quiz_questionSaves the answer of the customer to the current question of a quiz module, and returns the next question. Confirm the answer with the customer before you call this tool. Give the answer in the format that answer_format of the question names. A changed answer can remove the answe…
previous_quiz_questionMoves a quiz module back one question, as the Back button of the app does, and returns that question. It saves no answer, and it changes only the position in the quiz. Use it when the customer wants to change an earlier answer.
ask_claraAsks Clara, the First assistant, a question for the customer. Use it for a general question about prenups (prenuptial agreements), for example "Do I need a prenup?" or "What can a prenup cover?", and for a question about First. Clara knows the First app and the general legal poi…
list_documentsLists the customer's own documents, for example the prenup summary and the waivers: the kind, the title, whether the customer agreed, the date of the signature, and a link to the app. Some documents are only in the app. Call read_document with the kind for the text. The customer…
read_documentReturns the text of one of the customer's own documents, for example the prenup summary. Call list_documents for the kinds that the customer has.
list_assetsReturns the assets and debts on the customer's My Assets page, with their ids: the customer's own assets and the assets that the partner shares. Use it for the exact list or an id. Call ask_clara for questions about what the assets mean for the prenup. module_state tells if a wr…
list_family_membersReturns the dependents and pets on the customer's My Family page, with their ids: the customer's own family members and the members that the partner shares. Use it for the exact list or an id. Call ask_clara for questions about what the family members mean for the prenup. module…
describe_asset_formReturns the form of one kind of asset or debt on the My Assets page: the field keys, the labels, the options, the required fields, and the module_state. Call it before add_asset or update_asset. When module_state is closed, do not collect values: give the customer next_step_url.…
add_assetAdds an asset or a debt to the customer's My Assets page. Call describe_asset_form for the fields and the module_state first. Confirm the values with the customer before you call this tool. When module_state is edit_restarts_alignment, also tell the customer that the change rest…
update_assetChanges the fields of one of the customer's own assets or debts. Take the id and the module_state from list_assets. Give only the fields that change. Confirm the change with the customer before you call this tool. When module_state is edit_restarts_alignment, also tell the custo…
delete_assetDeletes one of the customer's own assets or debts. Take the id and the module_state from list_assets. Confirm the delete with the customer before you call this tool: the asset cannot be restored. When module_state is edit_restarts_alignment, also tell the customer that the delet…
describe_family_formReturns the form of a dependent or a pet on the My Family page: the field keys, the labels, the options, the required fields, and the module_state. Call it before add_family_member or update_family_member. When module_state is closed, do not collect values: give the customer nex…
add_family_memberAdds a dependent or a pet to the customer's My Family page. Call describe_family_form for the fields and the module_state first. Confirm the values with the customer before you call this tool. When module_state is edit_restarts_alignment, also tell the customer that the change r…
update_family_memberChanges the fields of one of the customer's own dependents or pets. Take the id and the module_state from list_family_members. Give only the fields that change. Confirm the change with the customer before you call this tool. When module_state is edit_restarts_alignment, also tel…
delete_family_memberDeletes one of the customer's own dependents or pets. Take the id and the module_state from list_family_members. Confirm the delete with the customer before you call this tool: the family member cannot be restored. When module_state is edit_restarts_alignment, also tell the cust…
complete_my_assetsCompletes the My Assets module, as the Complete button of the app does. Call it only when the customer says that the assets and the debts are complete. First call list_assets, and show the customer the full list of assets and debts. Then show this exact statement, and get an exp…
complete_my_familyCompletes the My Family module, as the Complete button of the app does. Call it only when the customer says that the list of family members is complete. First call list_family_members, and show the customer the full list of family members. Then show this exact statement, and get…
get_alignmentReturns the alignment steps of the prenup with the status of the customer and of the partner, the current step, and the data of a step as its app page shows it. The steps go in this order: financial-views (the customer agrees with the partner on each financial view), partners-pr…
set_allocationSaves one allocation pick of the customer: keep an item as separate property after the wedding, or share it (allocation_labels of get_alignment give the words of the app). kind asset is an own premarital asset that is not shared (get_alignment step premarital-property). kind mar…
review_financial_viewDoes one action of the financial-views step of alignment on one question, as the financial views page of the app does. Call get_alignment first: each question gives its actions. acknowledge: the customer read the different answer of the partner and accepts it. Show the answer of…
review_partner_propertySaves the review of the customer of the postmarital allocations of the partner, in the partners-postmarital-property step of alignment. Call get_alignment with this step first, and show the customer each item of the partner with its allocation. agree true accepts the allocation…
complete_alignment_stepCompletes one step of alignment, as the Complete Review button of its page does. Each step has the condition of its page: financial-views needs each question aligned. For partners-premarital-property, first show the customer each premarital asset of the partner (get_alignment wi…
complete_alignmentCompletes alignment, as the Complete Alignment button of the app does. Call it only when get_alignment gives ready_to_complete true, and the customer says to complete alignment. When get_alignment gives complete_statement, show this exact statement first, and get an explicit yes…
read_agreementReturns the text of the customer's agreement, as the agreement page of the app shows it. Send search to get only the parts around a word or phrase, for example "house". Leave search out to read the whole agreement, for example for a question about the agreement as a whole. A lon…
invite_partnerSends an invite email from First to the customer's partner, so the partner can join the agreement. Confirm the partner's name and email with the customer before you call this tool. When an invite is already pending, call resend_partner_invite to send it again, or update_partner_…
resend_partner_inviteSends the pending partner invite again, to the same email. Confirm with the customer before you call this tool. To invite a different email, call update_partner_invite. A partner who declined gets no new invite.
update_partner_inviteChanges the email or the name of a partner who did not join yet. A new email gets a new invite email from First. Send only the values that change. Confirm them with the customer before you call this tool. When the partner already has a First account, send a new email with both n…
Details
| Endpoint | https://mcp.thisfirst.com/mcp (Streamable HTTP) |
| First published | 9 Nov 2026 |
| Last updated | 9 Nov 2026 |
| Registry name | com.thisfirst/first |
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