io.usefulapiPublished by usefulapi.ioOfficial publisherv1.23.5Updated Nov 8, 2026
Validate emails, phones, IBAN, VAT; look up IPs and companies; rates, holidays, time via Abstract.
The publisher's own server: Ably MCP by usefulapi
Abstract API MCP by usefulapi's hosted MCP server (abstract-api.usefulapi.io), published by usefulapi.io; no sign-in required; Streamable HTTP; 14 tools.
No AI overview yet: these facts come from the registry entry and the server itself.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/io.usefulapi%2Fabstract-api/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.Add this to your client's mcpServers config.
{
"mcpServers": {
"abstract-api-by-usefulapi": {
"type": "http",
"url": "https://abstract-api.usefulapi.io/mcp"
}
}
}Use Abstract API from Claude, Cursor, or any MCP client — email validation, phone lookup, IP geolocation, company enrichment, IBAN and VAT validation, VAT rates and calculation, exchange rates (live, conversion, historical), public holidays and time zones. Connect with the keys of the Abstract APIs you use (at least one); every call spends credits from your own plan. Hosted, no local install: connect with your own Abstract API credentials.
Live endpoint: https://abstract-api.usefulapi.io/mcp · Homepage: https://usefulapi.io/abstract-api
https://abstract-api.usefulapi.io/mcp.claude mcp add --transport http abstract-api https://abstract-api.usefulapi.io/mcp, then run /mcp to log in.Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Abstract API credentials.
Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/abstract-api/
read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.
*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this server only. Subscribe with abstractapi_upgrade (it returns a Stripe Checkout link). Cancel any time with abstractapi_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running abstractapi_upgrade before then undoes the cancel. Or write to [email protected].
MIT © usefulapi. Not affiliated with or endorsed by Abstract API.
Source: servers/abstract-api/README.md at commit 4046075
Validate email
Check one email address: deliverability (format, MX, SMTP), quality score, free/disposable/role/catch-all flags, sender details and known data breaches. Email Reputation API. Spends 1 credit of your Email Reputation plan per request (a failed request counts too); needs the Email Reputation API key.
emailrequiredLook up phone number
Validate and enrich one phone number: format, carrier, line type (mobile, landline, VoIP), location, line status, risk and known breaches. Phone Intelligence API. Spends 1 credit of your Phone Intelligence plan per request (a failed request counts too); needs the Phone Intelligence API key.
phonerequiredcountryLook up IP address
Geolocation and security intelligence for one IPv4 or IPv6 address: VPN/proxy/Tor/hosting/abuse flags, ASN, company, location, timezone, flag and currency. IP Intelligence API. An explicit ip_address is required (without one Abstract would look up the caller's own address, which here is this server's). Spends 1 credit of your IP Intelligence plan per request (a failed request counts too); needs the IP Intelligence API key.
fieldsip_addressrequiredEnrich company
Firmographic data for a company web domain: name, description, logo, address, industry (SIC/NAICS), employee and revenue ranges, contacts, social profiles, technologies. Company Enrichment API. Spends 1 credit of your Company Enrichment plan per request (a failed request counts too); needs the Company Enrichment API key.
domainrequiredfieldsValidate IBAN
Check the structure and check digits of one International Bank Account Number. It does not prove that the account exists. IBAN Validation API. Spends 1 credit of your IBAN Validation plan per request (a failed request counts too); needs the IBAN Validation API key.
ibanrequiredValidate VAT number
Check whether a VAT number is valid and, if it is, return the registered company name and address. VAT Validation API. Spends 1 credit of your VAT Validation plan per request (a failed request counts too); needs the VAT Validation API key.
vat_numberrequiredCalculate VAT
Work out the VAT-compliant price for an amount in a country: the amounts without and with VAT, the VAT amount and the rate. Set is_vat_incl to true for the reverse calculation (the amount already contains VAT). VAT Validation API. Spends 1 credit of your VAT Validation plan per request (a failed request counts too); needs the VAT Validation API key.
amountrequiredis_vat_inclcountry_coderequiredvat_categoryList VAT rates
The latest VAT rates of one country: the standard rate and each reduced-rate category with its description. VAT Validation API. Abstract answers this endpoint without checking the key and may not count it as a credit; this tool still needs the VAT API key.
country_coderequiredGet exchange rates
Latest foreign-exchange and cryptocurrency rates for a base currency against one or more targets (all supported currencies if none is given). Exchange Rates API. Spends 1 credit of your Exchange Rates plan per request (a failed request counts too); needs the Exchange Rates API key.
baserequiredtargetConvert currency
Convert an amount from a base currency to one target currency, at the latest rate or at the rate of a past date. Exchange Rates API. Spends 1 credit of your Exchange Rates plan per request (a failed request counts too); needs the Exchange Rates API key.
baserequireddatetargetrequiredbase_amountGet historical exchange rates
Exchange rates of a base currency on a past date. Abstract lists this endpoint as closed beta: a key may be refused (HTTP 401/403) until Abstract enables it. Exchange Rates API. Spends 1 credit of your Exchange Rates plan per request (a failed request counts too); needs the Exchange Rates API key.
baserequireddaterequiredtargetGet public holidays
Public, local and religious holidays of a country for a date, a month or a year. Free Abstract plans require year, month and day together; paid plans default missing values to today. Public Holidays API. Spends 1 credit of your Public Holidays plan per request (a failed request counts too); needs the Public Holidays API key.
dayyearmonthcountryrequiredGet current time
The current local date, time and timezone (name, abbreviation, GMT offset, daylight saving) of a place, coordinates or IP address. Timezone API. Spends 1 credit of your Timezone plan per request (a failed request counts too); needs the Timezone API key.
locationrequiredConvert time between locations
Convert a date and time from one location to another (places, coordinates or IP addresses). Without base_datetime the current time is converted. Timezone API. Spends 1 credit of your Timezone plan per request (a failed request counts too); needs the Timezone API key.
base_datetimebase_locationrequiredtarget_locationrequired100% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
io.usefulapiOfficial publisher
Ably MCP by usefulapi's hosted MCP server, published by usefulapi.io; no sign-in required; Streamable HTTP; 15 tools.
io.usefulapiOfficial publisher
Hosted read-only MCP server that lets an assistant read Tiltify campaigns, donations and top donor and fundraiser leaderboards.
io.usefulapiOfficial publisher
Hosted Termii server that lets an assistant send SMS, check wallet balance, DND status, sender IDs and message history.
io.usefulapiOfficial publisher
Hosted MCP server that lets an assistant read Temp Stick temperature and humidity sensors, their readings and alert notifications.
io.usefulapiOfficial publisher
Connects an assistant to a Stibee email marketing workspace to read address books, subscribers and email stats, and to add subscribers and group members.
{ "mcpServers": { "abstract-api": { "url": "https://abstract-api.usefulapi.io/mcp" } }}