Abstract API MCP by usefulapi
REMOTE · ABSTRACT-API.USEFULAPI.IO
Validate emails, phones, IBAN, VAT; look up IPs and companies; rates, holidays, time via Abstract.
Available components
Last scanned (6 hours ago)
Scores higher than 47% of remote servers
Reachable. Last reached 18 Oct 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security78
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token. View diagnostics → Pass
- HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
- The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents. View diagnostics → Partial
Transport & Reachability0
- Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability83
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1866 tokens (~133/item across 14 items; 14 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 14 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 15 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 17 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 14 Oct 26 +3
- The server rewrote its instructions, which are the text every model session reads security
- The server now declares the “prompts” capability functional
- First check of Schema quality: 100 functional
- New prompt “getting_started” functional
- Server version: 1.0.0 → 1.1.0 functional
- 13 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 12 Oct 26 61
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 18 Oct 2026 · Probed https://abstract-api.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 13 Sept 2026 | 12 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | d9be3287b0fde9630e825ba1f79bff3f |
| SANs: usefulapi.io, *.usefulapi.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of abstract-api.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| usefulapi.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 302 |
WWW-Authenticate challenge Bearer realm="OAuth", resource_metadata="https://abstract-api.usefulapi.io/.well-known/oauth-protected-resource/mcp"
Bearer realm="OAuth", resource_metadata="https://abstract-api.usefulapi.io/.well-known/oauth-protected-resource/mcp"Protected resource metadata
| Document | https://abstract-api.usefulapi.io/.well-known/oauth-protected-resource/mcp |
|---|---|
| Retrieved | Yes |
| Resource | https://abstract-api.usefulapi.io/mcp |
| Authorisation server | https://abstract-api.usefulapi.io |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://abstract-api.usefulapi.io/mcp | Redirected | 302 | https://usefulapi.io/abstract-api/ |
| http (plaintext) | http://abstract-api.usefulapi.io/mcp | Inconclusive | 302 | http://abstract-api.usefulapi.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
abstractapi_calculate_vat Calculate VAT ~167
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.
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | yes | The amount to calculate from. |
| country_code | string | yes | Two-letter country code of the transaction, e.g. DE. |
| is_vat_incl | boolean | – | True if the amount already includes VAT (default false). |
| vat_category | string | – | A reduced-rate category from abstractapi_list_vat_rates (default: the standard rate). |
No output schema declared.
No examples provided.
abstractapi_convert_currency Convert currency ~137
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.
| Name | Type | Req | Description |
|---|---|---|---|
| base | string | yes | Currency to convert from, e.g. USD. |
| base_amount | number | – | Amount of the base currency (default 1). |
| date | string | – | A past date, yyyy-mm-dd (default: the latest rate). |
| target | string | yes | Currency to convert to, e.g. EUR (one currency). |
No output schema declared.
No examples provided.
abstractapi_convert_time Convert time between locations ~123
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.
| Name | Type | Req | Description |
|---|---|---|---|
| base_datetime | string | – | The time to convert, yyyy-mm-dd hh:mm:ss in the base location (default: now). |
| base_location | string | yes | The location the time belongs to. |
| target_location | string | yes | The location to convert the time into. |
No output schema declared.
No examples provided.
abstractapi_enrich_company Enrich company ~130
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.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | The company's domain, e.g. airbnb.com (a pasted URL is reduced to its domain). |
| fields | string | – | Only these top-level keys, e.g. company_name,industry,employee_range. |
No output schema declared.
No examples provided.
abstractapi_get_current_time Get current time ~97
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.
| Name | Type | Req | Description |
|---|---|---|---|
| location | string | yes | A place name (e.g. Oxford, United Kingdom), latitude,longitude coordinates, or an IP address. |
No output schema declared.
No examples provided.
abstractapi_get_exchange_rates Get exchange rates ~112
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.
| Name | Type | Req | Description |
|---|---|---|---|
| base | string | yes | Base currency, ISO 4217 code, e.g. USD. |
| target | string | – | Target currencies separated by commas, e.g. EUR,GBP,JPY. Omit for all. |
No output schema declared.
No examples provided.
abstractapi_get_historical_rates Get historical exchange rates ~123
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.
| Name | Type | Req | Description |
|---|---|---|---|
| base | string | yes | Base currency, e.g. USD. |
| date | string | yes | The past date, yyyy-mm-dd. |
| target | string | – | Target currencies separated by commas. Omit for all. |
No output schema declared.
No examples provided.
abstractapi_get_holidays Get public holidays ~142
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.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | yes | Two-letter country code, e.g. SG. |
| day | integer | – | Day of the month 1-31 (needs month and year). |
| month | integer | – | Month 1-12. |
| year | integer | – | Year, e.g. 2026. |
No output schema declared.
No examples provided.
abstractapi_list_vat_rates List VAT rates ~79
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.
| Name | Type | Req | Description |
|---|---|---|---|
| country_code | string | yes | Two-letter country code, e.g. DE. |
No output schema declared.
No examples provided.
abstractapi_lookup_ip Look up IP address ~160
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.
| Name | Type | Req | Description |
|---|---|---|---|
| fields | string | – | Only these top-level sections, e.g. location,security (security, asn, company, domains, location, timezone, flag, currency). |
| ip_address | string | yes | The IPv4 or IPv6 address to look up. Required. |
No output schema declared.
No examples provided.
abstractapi_lookup_phone Look up phone number ~121
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.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | – | Two-letter country code of the number, only needed when the number has no international prefix. |
| phone | string | yes | The phone number, ideally with the international prefix, e.g. +14155550100. |
No output schema declared.
No examples provided.
abstractapi_validate_email Validate email ~93
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.
| Name | Type | Req | Description |
|---|---|---|---|
| string | yes | The email address to check, e.g. jane@example.com. |
No output schema declared.
No examples provided.
abstractapi_validate_iban Validate IBAN ~81
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.
| Name | Type | Req | Description |
|---|---|---|---|
| iban | string | yes | The IBAN, with or without spaces. |
No output schema declared.
No examples provided.
abstractapi_validate_vat Validate VAT number ~88
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.
| Name | Type | Req | Description |
|---|---|---|---|
| vat_number | string | yes | The VAT number including the two-letter country prefix, e.g. SE556656688001. |
No output schema declared.
No examples provided.
How do I install the Abstract API MCP by usefulapi server?
Abstract API MCP by usefulapi is a hosted endpoint at https://abstract-api.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · abstract-api.usefulapi.io
claude mcp add --transport http io-usefulapi-abstract-api 'https://abstract-api.usefulapi.io/mcp'
What is the Abstract API MCP by usefulapi server?
Abstract API MCP by usefulapi is listed in the public MCP registry as io.usefulapi/abstract-api. Validate emails, phones, IBAN, VAT; look up IPs and companies; rates, holidays, time via Abstract. This page covers its hosted endpoint (https://abstract-api.usefulapi.io/mcp).
Is the Abstract API MCP by usefulapi server safe to use?
Abstract API MCP by usefulapi scores 65 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Abstract API MCP by usefulapi server expose?
Abstract API MCP by usefulapi exposes 14 tools: abstractapi_validate_email, abstractapi_lookup_phone, abstractapi_lookup_ip, abstractapi_enrich_company, abstractapi_validate_iban, and 9 more. Their descriptions and schemas cost roughly 1,653 tokens of context every time the server is loaded.
Does the Abstract API MCP by usefulapi server require authentication?
Yes. Abstract API MCP by usefulapi asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Abstract API MCP by usefulapi server still maintained?
Abstract API MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.