766 Classon Avenue, Brooklyn, NY 11238
BBL 3011740038 (Borough 3, Block 1174, Lot 38) · BIN 3029445, 3029444 · Last updated: · Prospect Heights · ZIP 11238
Also recorded in city data as: 76611 Classon Ave
Summary · as of November 8, 2026
766 Classon Avenue (Brooklyn, NY 11238; tax lot BBL 3011740038) is a 6-unit mixed-use building with apartments and ground-floor commercial space (building class S9: mixed-use: dwelling with stores or offices, miscellaneous), built around 1910, on a 2,667 sq ft lot zoned R6A. City tax records list the owner as 766 CLASSON AVE, LLC; the most recent deed with a stated price is dated August 24, 2004 at $10 (per ACRIS). The Department of Finance's final market value for tax year 2027 is $1,598,000. As of November 8, 2026, NYC Open Data shows two active DOB violations, four open HPD violations and 11 OATH tickets with an unpaid balance. There were three 311 requests in the past 12 months and no HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)
- Owner of record
- 766 CLASSON AVE, LLC
- Building class
- S9 · Mixed-use: dwelling with stores or offices, miscellaneous
- Year built · units
- 1910 · 6 res.
- Lot area · zoning
- 2,667 sq ft · R6A
- Market value (DOF)
- $1,598,000 FY2027
- Last priced deed
- $10 · 2004-08-24
- BBL
- 3011740038
- BIN
- 3029445, 3029444
- 0Open DOB jobs (permit issued, no sign-off)
- 2Active DOB violations
- 0Active ECB violations
- 4Open HPD violations
- 11OATH tickets with unpaid balance
How to cite: NYC Property Facts, “766 Classon Avenue, Brooklyn, NY 11238 (BBL 3011740038)”, data as of 2026-11-08, https://nycpropertyfacts.com/ny/brooklyn/766-classon-avenue-3011740038. Source: NYC Open Data.
Lot & building
Basic facts about the tax lot and building from the city’s PLUTO database.
- Owner (as listed by the city)
- 766 CLASSON AVE, LLCThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
- Building class
- S9 – Mixed-use: dwelling with stores or offices, miscellaneousThe Department of Finance’s category for what kind of building this is.
- Land use
- Mixed residential & commercialCity Planning’s broad category of how the lot is used.
- Year built
- 1910Often an estimate for older buildings.
- Floors
- 4
- Units
- 6 residential / 8 totalResidential units are apartments; total includes stores and offices.
- Buildings on lot
- 2
- Lot size
- 2,667 sq ft (26.67 ft × 100 ft)
- Building floor area
- 5,332 sq ft (incl. 1,333 sq ft commercial)
- Zoning
- R6AThe zoning district sets what can be built and used here. Residential district.
- Built vs. allowed density (FAR)
- 2.00 built / 3.00 max residentialFloor Area Ratio = building floor area ÷ lot area. If built FAR is below the maximum, zoning may allow more floor area (other rules apply).
- Identifiers
- BBL 3011740038 (Borough 3, Block 1174, Lot 38) · BIN 3029445, 3029444BBL identifies the tax lot; BIN identifies each building (from DOB/HPD/footprint records).
Agency lookups: DOB BIS · ZoLa (zoning map) · ACRIS
Source: PLUTO (Dept. of City Planning) — city dataset updated 2026-08-24; last loaded 2026-11-08; Building Footprints — city dataset updated 2026-11-08; last loaded 2026-11-08
Tax assessment
How the Department of Finance values this lot for property tax.
- Market value (tax year 2027, final roll)
- $1,598,000The Department of Finance’s estimate of value for tax purposes. It is not an appraisal and is often far from the sale price.
- Assessed value
- $719,100The portion of market value that taxes are calculated on (capped by law for small homes).
- Taxable value (final)
- $122,356Assessed value minus any exemptions.
- Tax class
- Tax class 2B – residential rental, 7–10 units
| Tax year | Roll | Market value | Assessed value | Tax class |
|---|---|---|---|---|
| 2027 | Final | $1,598,000 | $719,100 | 2B |
| 2026 | Final | $1,332,000 | $599,400 | 2B |
| 2025 | Final | $1,197,000 | $538,650 | 2B |
Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; last loaded 2026-11-08
Sales & deed history 10
Deeds recorded with the City Register (ACRIS). A deed transfers ownership. A $0 or very low price usually means a transfer between related parties, an estate, or a refinance-related transfer, not a market sale. This is not a title search; mortgages, liens and other documents are not shown.
| Date | Type | Price | Seller (grantor) | Buyer (grantee) | Doc ID |
|---|---|---|---|---|---|
| 2024-02-01 | DEED | $0 / not stated | The Valgean De Shong Living Trust | 766 Classon Ave, Llc | 2024020800504001 |
| 2006-12-18 | CORRD | $0 / not stated | De Shong, Valgean | De Shong, Valgean; Trustee Of Valgean De Shong Revocable Living Trust | 2006122700462001 |
| 2004-08-24 | DEED | $10 | De Shong, Valgean | De Shong As Trustee, Valgean; Valgean De Shong Revocable, Living Trust | 2004083102464001 |
| 1997-05-06 | DEED | $0 / not stated | De Shong, Valgean; Warner, Peter | De Shong, Valgean | FT_3950005680495 |
| 1987-09-28 | DEED | $0 / not stated | Barrizonte, Oscar; Barrizonte, Raquel | Warner, Peter; De Shong, Valgean | FT_3050001311705 |
| 1971-05-04 | DEED | $0 / not stated | Nadel Jack | Barrizonte Oscar; Barrizonte Raquel | BK_7130047901423 |
| 1971-05-04 | DEED | $0 / not stated | Marian Holding Corp | Nadel Jack | BK_7130047901421 |
| 1971-04-05 | DEED | $0 / not stated | Levin Rose E; Levin Alex B | Marian Holding Corp | BK_7130047400923 |
| 1967-05-01 | DEED | $0 / not stated one deed covering 6 lots; price is for all of them | Ameran Realty Co Inc | Levin Alex E; Levin Rose E | BK_6730041400075 |
| 1966-02-24 | DEED | $0 / not stated one deed covering 18 lots; price is for all of them | Goldstein Louis Exrs Of; Goldstein, Louis O | Alko Home Improvement Co Inc | BK_6630005200229 |
Source: ACRIS Real Property Master — city dataset updated 2026-10-08; last loaded 2026-11-08; ACRIS Real Property Legals — city dataset updated 2026-10-08; last loaded 2026-11-08; ACRIS Real Property Parties — city dataset updated 2026-10-08; last loaded 2026-11-08
DOB job filings 0 open of 2
A “job” is an application to the Department of Buildings to do construction work. A job marked Permitted, not signed off had a work permit issued but the city has no record of final sign-off (inspection/completion). Old jobs left in this state are common and appear in buyer and lender due diligence; the work may or may not have been done.
| Status | Job # | Type | Filed | Est. cost |
|---|---|---|---|---|
| Not open SIGNED OFF · 2012-03-27 | 320385962 BIS | A2 – Alteration with multiple work types (no change to use/occupancy) | 2011-11-02 | $5,000 |
| Not open SIGNED OFF · 2024-03-19 | 300987332 BIS | A2 – Alteration with multiple work types (no change to use/occupancy) | 2000-01-10 | — |
Source: DOB NOW: Build – Job Application Filings — city dataset updated 2026-11-07; last loaded 2026-11-08; DOB Job Application Filings (BIS) — city dataset updated 2026-11-07; last loaded 2026-11-08
Work permits 3
Individual permits issued under DOB jobs (one job can have several permits, e.g. plumbing and construction). Permit expiration alone does not mean the job was completed or signed off.
| Issued | Expires | Job # | Work | Permit status |
|---|---|---|---|---|
| 2011-11-16 | 2012-11-15 | 320385962 BIS | Plumbing / Plumbing | ISSUED (initial) |
| 2000-02-02 | 2000-10-01 | 300987332 BIS | Equipment work / Fuel burning | ISSUED (initial) |
| 2000-02-02 | 2000-10-01 | 300987332 BIS | Equipment work / Boiler | ISSUED (initial) |
Source: DOB NOW: Build – Approved Permits — city dataset updated 2026-11-07; last loaded 2026-11-08; DOB Permit Issuance (BIS) — city dataset updated 2026-11-07; last loaded 2026-11-07
DOB violations 2 active of 9
Violations issued by the Department of Buildings for building-code or zoning conditions. Active means DOB has not recorded the violation as resolved or dismissed. Many active DOB violations are old (e.g. elevator or boiler inspection paperwork).
| Status | Issued | Type | Description | Number |
|---|---|---|---|---|
| Active V-DOB VIOLATION - ACTIVE | 2024-09-23 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2023 EXTERNAL LOW PRESSURE INSPECTION | V092324LBLVIO08109 |
| Active V-DOB VIOLATION - ACTIVE | 1993-08-16 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V081693LL629135338 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2023-06-30 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2021 EXTERNAL LOW PRESSURE INSPECTION | V*063023LBLVIO38758 |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2023-06-30 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2020 EXTERNAL LOW PRESSURE INSPECTION | V*063023LBLVIO18511 |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2023-06-20 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2019 EXTERNAL LOW PRESSURE INSPECTION | V*062023LBLVIO40189 |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2023-06-20 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2018 EXTERNAL LOW PRESSURE INSPECTION | V*062023LBLVIO20421 |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2015-10-01 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2014 INSPECTION REPORT | V*100115LBLVIO06999 |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2006-01-06 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*010606LL629113259 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 1997-09-16 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*091697LL6291217595 |
Source: DOB Violations — city dataset updated 2026-11-07; last loaded 2026-11-08
ECB violations (DOB) 0 active of 0
DOB violations that go to a hearing at OATH (formerly the Environmental Control Board) and can carry fines. Active or Resolved follows the DOB violation status field. The hearing status is about the hearing and its penalty: written off means the city stopped collecting the fine, not that the condition was corrected. A balance due is a fine the city says is unpaid.
No records found in this dataset for this lot.
Source: DOB ECB Violations — city dataset updated 2026-11-07; last loaded 2026-11-08
OATH tickets (all agencies) 11 unpaid of 46
Summonses heard at the Office of Administrative Trials and Hearings, from agencies like Sanitation, Buildings, Fire and Health, linked to this lot’s block and lot. Default means the respondent did not appear at the hearing, which typically results in the maximum penalty. Tickets may be issued to tenants or businesses at the address, not just the owner. DOB ECB tickets appear here too.
| Status | Date | Agency | Charge | Respondent | Imposed / paid / balance | Ticket # |
|---|---|---|---|---|---|---|
| Unpaid balance Default DEFAULTED · DEFAULTED | 2026-07-09 | Sanitation Others | STORAGE OF RECEPTACLES FAILURE TO REMOVE RECEPTACLES | 766 CLASSON AVE LLC | $80 / $0 / $80 | 049884732H |
| Unpaid balance Default DEFAULTED · DEFAULTED | 2026-07-09 | Sanitation Others | FAIL TO CLEAN 18 INCH INTO STREET COMM MAN INDUSTRIAL MIXED USE 1ST | SWEETMAMAS 2 LLC | $80 / $0 / $80 | 049884731X |
| Unpaid balance Default DEFAULTED · DEFAULTED | 2026-06-25 | Pcs - Dohmh | FAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1ST | AVE LLC | $600 / $0 / $600 | 0803882631 |
| Unpaid balance Default DOCKETED · DEFAULTED | 2026-04-02 | Sanitation Others | FAIL TO CLEAN 18 INCH INTO STREET COMM MAN INDUSTRIAL MIXED USE 1ST | SWEETMAMAS 2 LLC | $450 / $0 / $450 | 049718821X |
| Unpaid balance Default DOCKETED · DEFAULTED | 2025-11-03 | Dos - Enforcement Agents | STORAGE OF RECEPTACLES NON-COLLECTION DAY | SWEETMAMAS 2 LLC | $300 / $0 / $300 | 049523533L |
| Unpaid balance Default DOCKETED · DEFAULTED | 2025-05-01 | Dos - Enforcement Agents | FAILURE TO CLEAN 18 INCHES INTO STREET | SWEET MAMA 2 LLC | $300 / $0 / $300 | 049125875H |
| Unpaid balance Default DOCKETED · DEFAULTED | 2024-12-20 | Dep - Bureau Of Env. Complianc | IDLING OF MOTOR VEHICLE ENGINE MORE THAN THREE MINUTES 2ND OFF | DIAL- A-CLEANER USA INC | $1,500 / $0 / $1,950 | 000998300L |
| Unpaid balance Default DOCKETED · DEFAULTED | 2023-05-31 | Dos - Enforcement Agents | SIDEWALK OBSTRUCTION | SPINNERS PIZZA 2 LLC | $300 / $0 / $300 | 047908509X |
| Unpaid balance Default DOCKETED · DEFAULTED | 2020-02-01 | Dep - Bureau Of Env. Complianc | MADE CAUSED PERMITTED MUSIC FROM COMMER. ESTAB. PERMITTED LEVELS | 872 DE KALB AVE LLC | $8,000 / $0 / $10,400 | 000286550Z |
| Unpaid balance Default DOCKETED · DEFAULTED | 2020-01-25 | Dep - Bureau Of Env. Complianc | MADE CAUSED PERMITTED MUSIC FROM COMMER. ESTAB. PERMITTED LEVELS | 872 DEKALB AVE LLC | $8,000 / $0 / $10,400 | 000284407R |
| Unpaid balance Default DEFAULTED · DEFAULTED | 2019-08-01 | Police Department | OPEN CONTAINER CONSUMPTION OF ALCOHOL ON STREETS | CANTRES | $25 / $0 / $25 | 0201369448 |
| Hearing pending NEW ISSUANCE | 2026-10-07 | Sanitation Others | FAIL TO CLEAN 18 INCH INTO STREET COMM MAN INDUSTRIAL MIXED USE 1ST | SWEETMAMAS 2 LLC | $50 / $0 / $50 | 080123209K |
Showing 12 of 46 records. The API and the source dataset have the full list.
Source: OATH Hearings Division Case Status — city dataset updated 2026-11-08; last loaded 2026-11-08
HPD registration & contacts
Owners of most rental buildings must register with the Department of Housing Preservation and Development each year and list an owner and managing agent.
- HPD building ID
- 221776
- Last registered
- 2024-11-08
- Registration valid until
- 2025-09-01 ExpiredRegistrations must be renewed every year.
| Role | Name | Company | Business city |
|---|---|---|---|
| Sitemanager | Sherwin Deshong | ||
| Agent | Sherwin Deshong | Brooklyn, Ny | |
| Individualowner | Valgean Deshong | Brooklyn, Ny |
Source: HPD Multiple Dwelling Registrations — city dataset updated 2026-11-04; last loaded 2026-11-08; HPD Registration Contacts — city dataset updated 2026-11-04; last loaded 2026-11-08
HPD housing-code violations 4 open of 12
Violations HPD inspectors issued for conditions in residential buildings (heat, leaks, mold, pests, lead paint, etc.). Class letters show how serious: Class A – non-hazardous (HPD gives 90 days to correct); Class B – hazardous (30 days to correct); Class C – immediately hazardous (24 hours to correct for most conditions); Class I – information / order (e.g. orders to register, lead or other administrative orders). Open means HPD has not recorded the condition as corrected.
| Status | Class | Issued | Apt | Condition |
|---|---|---|---|---|
| Open Nov Sent Out · 2026-05-04 | A | 2026-05-04 | (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Open Info Nov Sent Out · 2025-11-20 | I | 2025-11-20 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Open Nov Sent Out · 2005-01-11 | C | 2005-01-11 | 2R | SECTION 27-2056.7 ADM CODE -CORRECT FAILURE TO PROVIDE TO THE DEPARTMENT WITHIN 45 DAYS OF DEMAND ALL RECORDS REQUIRED TO BE MAINTAINED BY OWNER IN THE ENTIRE APARTMENT LOCATED AT APT 2R, 2nd STORY |
| Open Nov Sent Out · 2003-06-17 | A | 2003-06-17 | 3R | SECTION 27-2026 ADM CODE REPLACE WITH NEW THE DEFECTIVE FLUSH PIPE OF WATER CLOSET ... IN THE BATHROOM LOCATED AT APT 3R, 3rd STORY |
| Closed Violation Dismissed · 2023-12-26 | A | 2023-03-22 | (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Closed Violation Dismissed · 2023-05-01 | I | 2022-11-14 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Dismissed · 2023-12-26 | A | 2022-02-23 | (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Closed Violation Dismissed · 2023-05-01 | I | 2022-02-23 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Dismissed · 2023-12-26 | A | 2021-04-07 | (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Closed Violation Dismissed · 2023-05-01 | I | 2021-04-07 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Dismissed · 2017-12-18 | I | 2017-11-20 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Dismissed · 2015-12-22 | I | 2015-10-08 | SECTION27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE ?27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF P |
Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-11-08; last loaded 2026-11-08
HPD complaints 0
Complaints tenants or others made to HPD (usually via 311) about housing conditions, from 2019 onward. A complaint is not a violation; HPD may inspect and issue one.
No records found in this dataset for this lot.
Source: HPD Housing Maintenance Code Complaints and Problems — city dataset updated 2026-11-08; last loaded 2026-11-08
311 requests (last 12 months) 3
Recent 311 service requests the city geocoded to this lot: noise, illegal parking, heat, sanitation and more. Anyone can file them, so they describe activity at or near the address, not necessarily the building itself.
| Opened | Agency | Complaint | Status | Closed |
|---|---|---|---|---|
| 2026-01-26 | DOHMH | Food Establishment – Letter Grading | Closed | 2026-03-27 |
| 2025-11-28 | DPR | Maintenance or Facility – Rodent Sighting | Closed | 2025-12-02 |
| 2025-11-22 | DPR | Maintenance or Facility – Rodent Sighting | Closed | 2025-11-25 |
Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-11-07; last loaded 2026-11-07; a later sync attempt failed on 2026-11-08; showing the last successful load
Nearby properties
Ordered by map distance among lots on this street within 40 house numbers and on this tax block within 15 lot numbers.
More in Prospect Heights: Open HPD violations · Active DOB violations · Active ECB violations · Open DOB jobs · Unpaid OATH tickets
Closest on Classon Ave
- 774 Classon Avenue (23 ft) (10 open items)
- 764 Classon Avenue (27 ft) (two open items)
- 776 Classon Avenue (48 ft) (13 open items)
- 762 Classon Avenue (54 ft) (53 open items)
- 788 Classon Avenue (77 ft) (six open items)
- 760 Classon Avenue (81 ft) (six open items)
Same tax block (1174), closest first
- 528 Sterling Place (68 ft)
- 526 Sterling Place (92 ft)
- 524 Sterling Place (117 ft) (four open items)
- 501 St Johns Place (124 ft) (22 open items)
- 499 St Johns Place (139 ft) (29 open items)
- 520 Sterling Place (141 ft) (three open items)
Open-item counts as of November 8, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · Plain text · API & MCP docs