Worth
REMOTE · WORTH.AREA21.IO
Find what anything is worth: resale value, used and new prices, and where to buy or sell it.
Available components
Last scanned (18 hours ago)
Scores higher than 66% of remote servers
Reachable. Last reached 4 Nov 2026.
Category E-commerce
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 Security69
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 503, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability79
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 450 tokens (~112/item across 4 items; 3 tools + 1 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management47
- Stability observed for 14 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
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
- Supports UI / widget rendering.Pass
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.
- 3 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “where_to_buy_or_sell” rewrote its description, which is the text the model reads security
- “compare_prices” reworded the description of “estimate_high” cosmetic
- “compare_prices” reworded the description of “estimate_low” cosmetic
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 25 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 23 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 22 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
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 4 Nov 2026 · Probed https://worth.area21.io/mcp?src=mcp_registry
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=area21.io | CN=YE1,O=Let's Encrypt,C=US | 28 Sept 2026 | 27 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 691d833278fb99d6e1e3bbfc988c522535e |
| SANs: *.area21.io, area21.io | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of worth.area21.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 38690 | 8 | Verified |
| area21.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=15724800; includeSubDomains |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://worth.area21.io/mcp?src=mcp_registry | Verified | 200 | |
| http (plaintext) | http://worth.area21.io/mcp?src=mcp_registry | Inconclusive | 503 |
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 →
compare_prices Compare new, used, and resale ~127
New, used, and resale prices for one named item. estimate_low and estimate_high carry a range already priced, or -1 when the title still needs a price.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | Category hint. |
| condition | string | – | Condition the user stated. |
| estimate_high | number | – | High end from price_item. -1 when there is none. |
| estimate_low | number | – | Low end from price_item. -1 when there is none. |
| grade | string | – | Card grade such as PSA 9. |
| title | string | yes | Item name to compare. |
| Name | Type | Req | Description |
|---|---|---|---|
| best | string | yes | – |
| comps | number | – | – |
| confidence | number | yes | – |
| confidence_label | string | – | – |
| currency | string | yes | – |
| estimate_high | number | yes | – |
| estimate_low | number | yes | – |
| from_past | boolean | – | – |
| headline | string | yes | – |
| links | array | yes | – |
| name | string | yes | – |
| new_from | number | yes | – |
| new_label | string | yes | – |
| outcome | string | yes | – |
| priced | boolean | yes | – |
| resale_high | number | yes | – |
| resale_label | string | yes | – |
| resale_low | number | yes | – |
| retailers | array | – | – |
| used_from | number | yes | – |
| used_label | string | yes | – |
| view | string | yes | – |
No examples provided.
price_item Price an item ~154
Prices one item from a photo or a name. Returns what it is worth as a range, the new and used asking prices, resale, and a confidence.
| Name | Type | Req | Description |
|---|---|---|---|
| condition | string | – | Condition the user already stated. |
| image_base64 | string | – | Base64 photo bytes, without a data: prefix. Empty if there is no inline photo. |
| image_url | string | – | https URL of a photo of the item. Empty if there is no URL. |
| media_type | string | – | Photo type when a photo is sent. |
| notes | string | – | Any other fact the user added. |
| title | string | – | Item name, as the user said it. Empty when the photo is the only input. |
| Name | Type | Req | Description |
|---|---|---|---|
| best | string | yes | – |
| comps | number | – | – |
| confidence | number | yes | – |
| confidence_label | string | – | – |
| currency | string | yes | – |
| estimate_high | number | yes | – |
| estimate_low | number | yes | – |
| from_past | boolean | – | – |
| headline | string | yes | – |
| links | array | yes | – |
| name | string | yes | – |
| new_from | number | yes | – |
| new_label | string | yes | – |
| outcome | string | yes | – |
| priced | boolean | yes | – |
| resale_high | number | yes | – |
| resale_label | string | yes | – |
| resale_low | number | yes | – |
| retailers | array | – | – |
| used_from | number | yes | – |
| used_label | string | yes | – |
| view | string | yes | – |
No examples provided.
where_to_buy_or_sell Where to buy or sell ~102
Marketplace links to buy one named item new, buy it used, or sell it. Returns marketplace links for the item; these are the only URLs this tool provides. Links are Worth tracking links and may carry affiliate tags.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | Category hint. |
| intent | string | – | What the user wants to do. |
| place | string | – | Kind of shop nearby, such as card shop. |
| title | string | yes | Item name. |
| Name | Type | Req | Description |
|---|---|---|---|
| best | string | yes | – |
| comps | number | – | – |
| confidence | number | yes | – |
| confidence_label | string | – | – |
| currency | string | yes | – |
| estimate_high | number | yes | – |
| estimate_low | number | yes | – |
| from_past | boolean | – | – |
| headline | string | yes | – |
| links | array | yes | – |
| name | string | yes | – |
| new_from | number | yes | – |
| new_label | string | yes | – |
| outcome | string | yes | – |
| priced | boolean | yes | – |
| resale_high | number | yes | – |
| resale_label | string | yes | – |
| resale_low | number | yes | – |
| retailers | array | – | – |
| used_from | number | yes | – |
| used_label | string | yes | – |
| view | string | yes | – |
No examples provided.
How do I install the Worth MCP server?
Worth is a hosted endpoint at https://worth.area21.io/mcp?src=mcp_registry, 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 · worth.area21.io
claude mcp add --transport http a21ai-worth 'https://worth.area21.io/mcp?src=mcp_registry'
What is the Worth MCP server?
Worth is an MCP server listed in the public MCP registry as io.github.a21ai/worth. Find what anything is worth: resale value, used and new prices, and where to buy or sell it. This page covers its hosted endpoint (https://worth.area21.io/mcp?src=mcp_registry).
Is the Worth MCP server safe to use?
Worth scores 76 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 Worth MCP server expose?
Worth exposes 3 tools: price_item, compare_prices, where_to_buy_or_sell. Their descriptions and schemas cost roughly 383 tokens of context every time the server is loaded.
Does the Worth MCP server require authentication?
No. We connected to Worth without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Worth MCP server still maintained?
Worth is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.